Exotic Meats USA Announces Urgent Statewide Recall of Elk Tenderloin Because It May Contain Meat Derived From An Elk Confirmed To Have CWD
Exotic Meats USA Announces Urgent Statewide Recall of Elk Tenderloin Because It May Contain Meat Derived From An Elk Confirmed To Have Chronic Wasting Disease (February 9)
Mon, 09 Feb 2009 14:25:00 -0600
http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Exotic Meats USA of San Antonio, TX is initiating a voluntary recall of Elk Tenderloin because it may contain meat derived from an elk confirmed to have Chronic Wasting Disease (CWD). The meat with production dates of December 29, 30 and 31, 2008 was purchased from Sierra Meat Company in Reno, NV. The infected elk came from Elk Farm LLC in Pine Island, MN and was among animals slaughtered and processed at USDA facility Noah's Ark Processors LLC.
http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Recall -- Firm Press Release FDA posts press releases and other notices of recalls and market withdrawals from the firms involved as a service to consumers, the media, and other interested parties. FDA does not endorse either the product or the company.
Exotic Meats USA Announces Urgent Statewide Recall of Elk Tenderloin Because It May Contain Meat Derived From An Elk Confirmed To Have Chronic Wasting Disease Contact: Exotic Meats USA 1-800-680-4375
FOR IMMEDIATE RELEASE -- February 9, 2009 -- Exotic Meats USA of San Antonio, TX is initiating a voluntary recall of Elk Tenderloin because it may contain meat derived from an elk confirmed to have Chronic Wasting Disease (CWD). The meat with production dates of December 29, 30 and 31, 2008 was purchased from Sierra Meat Company in Reno, NV. The infected elk came from Elk Farm LLC in Pine Island, MN and was among animals slaughtered and processed at USDA facility Noah’s Ark Processors LLC.
Chronic Wasting Disease (CWD) is a fatal brain and nervous system disease found in elk and deer. The disease is caused by an abnormally shaped protein called a prion, which can damage the brain and nerves of animals in the deer family. Currently, it is believed that the prion responsible for causing CWD in deer and elk is not capable of infecting humans who eat deer or elk contaminated with the prion, but the observation of animal-to-human transmission of other prion-mediated diseases, such as bovine spongiform encephalopathy (BSE), has raised a theoretical concern regarding the transmission of CWD from deer or elk to humans. At the present time, FDA believes the risk of becoming ill from eating CWD-positive elk or deer meat is remote. However, FDA strongly advises consumers to return the product to the place of purchase, rather than disposing of it themselves, due to environmental concerns.
Exotic Meats USA purchased 1 case of Elk Tenderloins weighing 16.9 lbs. The Elk Tenderloin was sold from January 16 – 27, 2009. The Elk Tenderloins was packaged in individual vacuum packs weighing approximately 3 pounds each. A total of six packs of the Elk Tenderloins were sold to the public at the Exotic Meats USA retail store. Consumers who still have the Elk Tenderloins should return the product to Exotic Meats USA at 1003 NE Loop 410, San Antonio, TX 78209. Customers with concerns or questions about the Voluntary Elk Recall can call 1-800-680-4375. The safety of our customer has always been and always will be our number one priority.
Exotic Meats USA requests that for those customers who have products with the production dates in question, do not consume or sell them and return them to the point of purchase. Customers should return the product to the vendor. The vendor should return it to the distributor and the distributor should work with the state to decide upon how best to dispose. If the consumer is disposing of the product he/she should consult with the local state EPA office.
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http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Cross-sequence transmission of sporadic Creutzfeldt-Jakob disease creates a new prion strain
Date: August 25, 2007 at 12:42 pm PST
our results raise the possibility that CJD cases classified as VV1 may include cases caused by iatrogenic transmission of sCJD-MM1 prions or food-borne infection by type 1 prions from animals, e.g., chronic wasting disease prions in cervid. In fact, two CJD-VV1 patients who hunted deer or consumed venison have been reported (40, 41). The results of the present study emphasize the need for traceback studies and careful re-examination of the biochemical properties of sCJD-VV1 prions.
http://www.jbc.org/
snip...
Clearly, it is premature to draw firm conclusions about CWD passing naturally into humans, cattle and sheep, but the present results suggest that CWD transmissions to humans would be as limited by PrP incompatibility as transmissions of BSE or sheep scrapie to humans. Although there is no evidence that sheep scrapie has affected humans, it is likely that BSE has caused variant CJD in 74 people (definite and probable variant CJD cases to date according to the UK CJD Surveillance Unit). Given the presumably large number of people exposed to BSE infectivity, the susceptibility of humans may still be very low compared with cattle, which would be consistent with the relatively inefficient conversion of human PrP-sen by PrPBSE. Nonetheless, since humans have apparently been infected by BSE, it would seem prudent to take reasonable measures to limit exposure of humans (as well as sheep and cattle) to CWD infectivity as has been recommended for other animal TSEs.
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http://www.emboj.org/current.shtml
snip
http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
From: TSS (216-119-163-189.ipset45.wt.net) Subject: CWD aka MAD DEER/ELK TO HUMANS ??? Date: September 30, 2002 at 7:06 am PST
From: "Belay, Ermias" To: Cc: "Race, Richard (NIH)" ; ; "Belay, Ermias" Sent: Monday, September 30, 2002 9:22 AM Subject: RE: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS
Dear Sir/Madam, In the Archives of Neurology you quoted (the abstract of which was attached to your email), we did not say CWD in humans will present like variant CJD.
That assumption would be wrong. I encourage you to read the whole article and call me if you have questions or need more clarification (phone: 404-639-3091). Also, we do not claim that "no-one has ever been infected with prion disease from eating venison." Our conclusion stating that we found no strong evidence of CWD transmission to humans in the article you quoted or in any other forum is limited to the patients we investigated.
Ermias Belay, M.D. Centers for Disease Control and Prevention
-----Original Message----- From: Sent: Sunday, September 29, 2002 10:15 AM To: [log in to unmask]">[log in to unmask]; [log in to unmask]">[log in to unmask]; [log in to unmask]">[log in to unmask] Subject: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS
Sunday, November 10, 2002 6:26 PM ......snip........end..............TSS
also,
A. Aguzzi - Chronic Wasting Disease (CWD) also needs to be addressed. Most serious because of rapid horizontal spread and higher prevalence than BSE in UK, up to 15% in some populations. Also may be a risk to humans - evidence that it is not dangerous to humans is thin.
http://www.tseandfoodsafety.org/activities/bse_conference_basel_april_02/2summar
http://chronic-wasting-disease.blogspot.com/2008/08/cwd-stakeholder-advisory-group.html
The following paper published in the November issue of the Journal of Virology reports experimental transmission of Chronic Wasting Disease (CWD) prions to a primate species. The paper is entitled Interspecies Transmission of Chronic Wasting Disease Prions to Squirrel Monkeys (_Saimiri sciureus_). The authors are: Richard F. Marsh (1) (Deceased), Anthony E. Kincaid (2), Richard A. Bessen (3), and Jason C. Bartz(4)*, at the Department of Animal Health and Biomedical Sciences, University of Wisconsin, Madison 53706(1), Department of Physical Therapy(2), Department of Medical Microbiology and Immunology, Creighton University, Omaha, Nebraska 68178(4), Department of Veterinary Molecular Biology, Montana State University, Bozeman, Montana 59718(3).
The Abstract reads as follows: "Chronic wasting disease (CWD) is an emerging prion disease of deer and elk. The risk of CWD transmission to humans following exposure to CWD-infected tissues is unknown. To assess the susceptibility of nonhuman primates to CWD, 2 squirrel monkeys were inoculated with brain tissue from a CWD-infected mule deer. The CWD-inoculated squirrel monkeys developed a progressive neurodegenerative disease and were euthanized at 31 and 34 months postinfection. Brain tissue from the CWD-infected squirrel monkeys contained the abnormal isoform of the prion protein, PrP-res, and displayed spongiform degeneration. This is the 1st reported transmission of CWD to primates."
http://apex.oracle.com/pls/otn/f?p=2400:1001:265605120839108489::::F2400_P1001_BACK_PAGE,F2400_P1001_ARCHIVE_NUMBER,F2400_P1001_USE_ARCHIVE:1202,20051108.3270,Y
P01.47 Quantifying the Species Barrier in Chronic Wasting Disease by a Novel invitro Conversion Assay
Li, L1; Coulthart, MB2; Balachandran, A3; Chakrabartty, A4; Cashman, NR11University of British Columbia, Brain Research Centre, Canada; 2PublicHealth Agencyof Canada, National Microbiology Laboratory, Canada; 3Animal DiseasesResearch Institute, Canada Food Inspection Agency, National ReferenceLaboratory forScrapie and CWD, Canada; 4Ontario Cancer Institute and Department of MedicalBiophysics, University of Toronto, Canada
Background: Chronic wasting disease (CWD) is a transmissible spongiformencephalopathy that can affect North American cervids (deer, elk, andmoose).Although the risk of CWD crossing the species barrier and causing humandisease is still unknown, however, definite bovine spongiform encephalopathy(BSE)transmission to humans as variant CJD (vCJD), it would seem prudent to limitthe exposure of humans to CWD.Aim: In view of the fact that BSE can be readily transmitted to non-bovidspecies, it is important to establish the species susceptibility range ofCWD.Methods: In vitro conversion system was performed by incubation of prionswith normal brain homogenates as described before, and protease K (PK)resistantPrP was determined by immunoblotting with 6H4 monoclonal prion antibody.Results: Our results demonstrate that PrPC from cervids (including moose)can be efficiently converted to a protease-resistant form by incubation withelkCWD prions, presumably due to sequence and structural similarities betweenthesespecies. Interestingly, hamster shows a high conversion ratio by PrPCWD.Moreover,partial denaturation of substrate PrPC can apparently overcome thestructuralbarriers between more distant species.Conclusions: Our work correctly predicted the transmission of CWD to a wildmoose.We find a species barrier for prion protein conversion between cervids andother species, however, this barrier might be overcome if the PrPC substratehasbeen partially denatured in a cellular environment. Such an environmentmightalso promote CWD transmission to non-cervid species, *** including humans. Acid/GdnHCl-treated brain PrPC was a superior substrate for the in vitroconversion than PrPC treated at physiological pH. This has implications forthe processby which the prion protein is converted in disease.
http://www.prion2007.com/pdf/Prion%20Book%20of%20Abstracts.pdf
North American Cervids Harbor Two Distinct CWD Strains
Authors
Angers, R. Seward, T, Napier, D., Browning, S., Miller, M., Balachandran A., McKenzie, D., Hoover, E., Telling, G. 'University of Kentucky; Colorado Division of Wildlife, Canadian Food Inspection Agency; University Of Wisconsin; Colorado State University.
Content
Despite the increasing geographic distribution and host range of CWD, little is known about the prion strain(s) responsible for distinct outbreaks of the disease. To address this we inoculated CWD-susceptible Tg(CerPrP)1536+/· mice with 29 individual prion samples from various geographic locations in North America. Upon serial passage, intrastudy incubation periods consistently diverged and clustered into two main groups with means around 210 and 290 days, with corresponding differences in neuropathology. Prion strain designations were utilized to distinguish between the two groups: Type I CWD mice succumbed to disease in the 200 day range and displayed a symmetrical pattern of vacuolation and PrPSc deposition, whereas Type II CWD mice succumbed to disease near 300 days and displayed a strikingly different pattern characterized by large local accumulations of florid plaques distributed asymmetrically. Type II CWD bears a striking resemblance to unstable parental scrapie strains such as 87A which give rise to stable, short incubation period strains such as ME7 under certain passage conditions. In agreement, the only groups of CWD-inoculated mice with unwavering incubation periods were those with Type I CWD. Additionally, following endpoint titration of a CWD sample, Type I CWD could be recovered only at the lowest dilution tested (10-1), whereas Type II CWD was detected in mice inoculated with all dilutions resulting in disease. Although strain properties are believed to be encoded in the tertiary structure of the infectious prion protein, we found no biochemical differences between Type I and Type II CWD. Our data confirm the co·existence of two distinct prion strains in CWD-infected cervids and suggest that Type II CWD is the parent strain of Type I CWD.
see page 29, and see other CWD studies ;
http://www.neuroprion.org/resources/pdf_docs/conferences/prion2008/abstract-book-prion2008.pdf
A prion disease of cervids: Chronic wasting disease 2008Posted Jun 24 08 5:07pm 1: Vet Res. 2008 Apr 3;39(4):41
A prion disease of cervids: Chronic wasting disease
Sigurdson CJ.
The recent discovery of chronic wasting disease in cervids (CWD) beyond the borders of Colorado and Wyoming, as far east as New York and including two Canadian Provinces, has led to the emergence of CWD as a prion disease of domestic and international importance. The apparent ease of horizontal transmission, potentially via environmental contamination or by prion-containing saliva, creates enormous challenges for disease management. Ongoing studies of CWD interspecies transmission by exposure of domestic and non-domestic species directly or using transgenic mice have shed light on species barriers. Transgenic mice expressing cervid PrP have also proven useful for assessing the genetic influences of Prnp polymorphisms on CWD susceptibility. Accumulating evidence of CWD pathogenesis indicates that the misfolded prion protein, PrPSc, seems to be widely disseminated in many nonneural organs, and CWD infectivity has been recently detected in blood. This review highlights recent research findings in this disease of free-ranging wildlife.
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3. CWD prion spread and target organs
Collectively, CWD pathogenesis studies have revealed extensive deposition of PrPSc in the central nervous system (CNS) and extraneural tissues (Fig. 1). The only other natural prion diseases that even approach this degree of systemic involvement are variant Creutzfeldt-Jakob disease (vCJD) in humans, sheep scrapie, and transmissible mink encephalopathy [22, 23, 30, 61, 62]. In mule deer, PrPSc is detectable in the retropharyngeal lymph node within only 6 weeks following an oral exposure [76]. In a further study of the kinetics of prion
1http://www.aphis.usda.gov/vs/nahps/cwd/cwd-distribution.html
5
infection in mule deer, Fox et al. showed that PrPSc is widely distributed in lymphoid tissues by 3 months post-oral exposure when it is first detected in brain [17]. By 9 months, PrPSc was detected in the myenteric and submucosal plexi throughout the gastrointestinal tract and in the vagus nerve, and by 16 months, PrPSc deposits were detectable throughout the brain and spinal cord. The Prnp genotype seemed to impact the infection kinetics in that mule deer that were SF heterozygous at codon 225 showed a delay in PrPSc spread; PrPSc was not
detectable in the brain until 16 months post-inoculation which was 13 months later than the 225SS deer. Perhaps the 225F allele confers a dominant negative effect on the kinetics of this CWD strain, as has been described in sheep, where the 171R allele has been shown to have a dominant negative effect on prion susceptibility [20, 33]. CWD pathogenesis seems to vary between deer and elk: PrPSc levels have been found to be lower in lymphoid tissues of elk compared to deer [66]. In a report of 226 CWD-infected elk, 28 had no PrPSc in lymphoid tissues despite having PrPSc in brain [81]. In addition to lymphoid tissues, PrPSc or infectivity has been detected in other non-CNS tissues, including pancreas [17, 77], adrenal gland [17, 77], and skeletal muscle [2]. Recently PrPSc was described in cardiac muscle from 7 of 16 (44%) white-tailed deer and from 12 of 17 (71%) elk [35]. This is the first report of PrPSc in cardiac muscle in any TSE. The cellular and molecular mechanisms of systemic prion spread are under investigation in many laboratories. A recent report showed that blood from CWD-infected deer contained infectivity and could transmit prion disease via a blood transfusion [50]. This finding recapitulates indirect findings of blood infectivity in vCJD affected humans [61] and experimental transfusion studies of scrapie sick sheep [32], and indicates that prion transport
throughout the body may include the blood as a potential vehicle.
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6. CWD strains among deer and elk
Prion strains, such as those seen in sheep scrapie, show distinct incubation periods in differentially susceptible inbred mice and lesions target discrete brain regions [11, 18, 19]. CWD in deer and elk has been considered a single disease entity, and western blot glycoform patterns of PrPSc are similar among deer and elk [67]. However, some new data indicate otherwise, suggesting that conformational variants, or strains, may exist. In a study by Raymond et al., Syrian golden hamsters were infected with mule deer or elk CWD, but with an incomplete attack rate; only 2 of 7 and 0 of 7 hamsters developed terminal disease, respectively. Indeed, second and third passage of the mule deer derived strain resulted in a short incubation period of only 85-89 days, whereas the elk-derived strain led to an incubation period of 408-544 days. Surprisingly, when mule deer CWD was first passaged in hamster PrP expressing transgenic mice and then into hamsters, a slowly replicating strain
with distinct clinical disease and PrPSc deposition patterns in brain ensued. Therefore two different strains could be passaged from a single mule deer CWD isolate, a rapid and a slowly replicating strain with differing disease phenotypes [70]. Alternatively, these strains could have been generated upon interspecies transmission [6].
We have also observed two strains arising from a single CWD-infected mule deer upon
passage in transgenic mice overexpressing murine PrP. Here, mice developed different
PrPSc aggregate morphologies in brain, either dense, congophilic plaques or fine, diffuse aggregates which could be selectively passaged [78]. LaFauci et al. have reported that elk PrP expressing transgenic mice developed phenotypically divergent diseases when inoculated with either mule deer or elk CWD, which was also suggestive of different strains [44]. In each of these studies, it is not clear whether mule deer and elk possess heterogeneous PrP aggregates (strain mixture), or whether the strains may have developed in the new host. However, Safar et al. have reported differing conformational characteristics for PrPSc from CWD-infected white-tailed deer and elk directly, using a conformation dependent immunoassay (CDI) [71], which supports the existence of CWD strains. The possible existence of CWD strains is perhaps not entirely surprising, considering that there are genetic Prnp differences among deer and elk that could influence PrPSc conformation [34, 36, 58].
7
7. Interspecies CWD transmission
Wild predators and scavengers are presumably feeding on CWD-infected carcasses.
Skeletal muscle has been shown to harbor CWD prion infectivity [2], underscoring that other species will almost certainly be exposed to CWD through feeding. However, CWD has not been successfully transmitted by oral inoculation to species outside of the cervid family, suggestive of a strong species barrier for heterologous PrP conversion. Ferrets (family Mustelidae) can be infected with deer CWD after intracerebral (ic) but not oral exposure [5, 80]. Raccoons resisted even ic infection for up to 2 years thus far [24]. Mountain lion (Puma concolor) susceptibility to experimental feeding of CWD prions is currently under investigation (M. Miller and L. Wolfe, personal communication).
Could wild rodents colonizing CWD- or scrapie-infected pastures serve as an environmental reservoir of prion infectivity? Interestingly, bank voles (Clethrionomys glareolus), are readily infected with CWD and sheep scrapie by intracerebral inoculation ([64]; U. Agrimi, unpublished data) and are considered as a potential reservoir for sheep scrapie [64]. Many vole species occur in North America [65, 83] and further research may determine whether voles enhance CWD or scrapie spread through environmental contamination.
Given that environmental contamination with CWD prions likely occurs [55], domestic
ruminants may be exposed to CWD through common grazing areas. However, sheep and
cattle appear to be poorly susceptible to mule deer CWD: ic inoculation with mule deer CWD succeeded to infect only 2 of 8 sheep [28]; likewise cattle have not been infected after cograzing with CWD-infected mule deer, or after a direct oral exposure (over 6 years) (M. Miller, personal communication). Even direct ic inoculation led to CWD infection in only 5 of 13 cattle (38%) after 2-5 years [26]. In contrast, cattle are highly susceptible to white-tailed deer CWD with 12 of 14 animals developing neurologic disease and PrPSc by only 22 months post-ic inoculation (+/-0.5 months) [29]. Further studies are planned to determine whether
cattle are susceptible to white-tailed deer prions after an oral exposure (J. Richt, personal communication). The differential susceptibility of cattle to CWD from mule deer versus whitetailed deer suggests that CWD strains exist, and that CWD may differentially cross species barriers depending on the strain. Nevertheless, to date, natural CWD infections have been detected only in cervids.
Is the converse true, are cervids susceptible to sheep scrapie? Only one study has been performed on cervid susceptibility to sheep scrapie by the ic route, and showed that 3 of 6 elk developed neurologic signs, spongiform encephalopathy and PrPSc in brain [25]. Further experiments to address this question may be interesting since sheep scrapie is considered a possible source for CWD in North America [89, 91].
8. Human susceptibility to CWD
Millions of North Americans hunt deer and elk (U.S. Department of the Interior, Census Bureau), and there is no doubt that people have been exposed to CWD through venison consumption, particularly in light of recent data showing CWD prions in muscle [2]. Human susceptibility to CWD or to other newly emerging animal TSE [9, 14] is still unclear, although we can be somewhat reassured in that there have been no large scale outbreaks of human TSE cases in Colorado and Wyoming, where CWD has existed for decades [51]. Up until approximately 10 years ago, autopsies were not performed on suspect human TSE cases in many states due to biosafety concerns, therefore the diagnosis of potential new TSE strains has been hampered. This indicates that clinical TSE diagnoses in humans were not confirmed, nor was any strain typing done to look for the appearance of potentially subtle or unusual pathological or biochemical phenotypes of a new TSE strain. Fortunately, the
autopsy rate for suspect cases is improving. At the National Prion Disease Pathology
Surveillance Center at Case Western Reserve University (Cleveland, Ohio), Creutzfeldt-Jakob disease (CJD) suspect cases are studied and classified by CJD subtype. Thus far,
8
*** twenty-seven CJD patients who regularly consumed venison were reported to the
Surveillance Center***,
however there have been no unusual or novel prion subtypes that might indicate the appearance of a new prion strain [7, 41]. Other indirect studies of human susceptibility to CWD also suggest that the risk is low. In biochemical conversion studies, Raymond et al. [68] showed that the efficiency of CWD to
convert recombinant human PrP into amyloid fibrils was low, but similar to that of both BSE and scrapie fibrils to do the same. These results suggest that there is a molecular incompatibility in the conversion of human PrPC by CWD, sheep scrapie, or BSE, and that cross species infections in humans may be rare events.
To determine whether common PrPSc strain features may link CWD and CJD, histopathology and the PrPSc biochemical characteristics from deer and elk were compared with that of humans with sporadic CJD (sCJD) cases that are methionine homozygous at codon 129 of the Prnp gene by Xie et al. [96], although strain features including histologic profile, target organs, and glycoform patterns will not necessarily remain the same upon crossing species barriers [6, 5, 8, 57]. The PrPSc form is cleaved by proteinase-K (PK) at different sites depending on the conformation of the protein and may aid determination of whether the PrPSc conformation is similar. By western blot (SDS-PAGE) of elk CWD, the unglycosylated
PK-resistant PrPSc migrated at 21 kDa, similar to sCJD (MM1 subtype) and the PK cleavage site was the same, occurring at residues 78 and 82 as assessed by N-terminal sequencing. Conformational stability was evaluated by measuring the PrPSc stability under partially denaturing conditions and also showed no significant difference between elk CWD and sCJD MM1 PrPSc. However, elk CWD and human sCJD MM1 strains exhibited distinct glycoform patterns by two dimensional gel electrophoresis, suggesting that the strains differed. Future studies may utilize luminescent conjugated polymers, which were recently shown to distinguish naturally- and experimentally-derived prion strains [79].
To study elk-human prion species barriers, Kong et al. inoculated elk CWD into transgenic mice expressing either human PrP or elk PrP. Whereas the elk PrP expressing mice developed disease after only 118-142 days post-inoculation, human PrP expressing mice (129M) did not develop any features of TSE after more than 657 or more than 756 days [41].
In accordance with these results, Tamgüney et al. also reported that human PrP
overexpressing mice were not susceptible to 9 CWD isolates from mule deer, white-tailed deer, and elk [84]. However, mice have a limited lifespan and further passages may be necessary to detect low levels of prion infectivity that may be present subclinically. Although indirect evidence is accumulating that there may be a robust species barrier for CWD transmission to humans, one report indicates nonhuman primate susceptibility to CWD. Intracerebral inoculation of squirrel monkeys (Saimiri sciureus) demonstrated a positive CWD transmission [49]. Among non-human primates, however, the Prnp sequence of the new world monkeys are the most distant from humans [72], and therefore may not indicate that human prion conversion would occur by CWD.
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11. Disease control challenges posed by CWD
Evidence is building that indicates efficient horizontal transmission occurs in CWD, indeed a complicating aspect in disease control [91]. Potential transmission mechanisms range from spread via direct contact among animals to environmental exposure through grazing in areas contaminated by prion-infected secretions, excretions (saliva, urine, feces), tissues (placenta), or decomposed carcasses. Recently, in a breakthrough finding, saliva from CWD infected deer was shown to transmit prion disease [50]. An additional experiment by Miller and colleagues showed that CWD-infected carcasses allowed to decay naturally in confined pastures can lead to CWD infections in captive deer, demonstrating the potential for
environmental contamination to spread infection [55]. Modelling studies have provided further
10
support that environmental contamination is likely playing a significant role in transmitting CWD [56, 53]. Additionally, infectious prions have been demonstrated to bind soil particles and remain infectious to animals by both intracerebral and oral exposure routes [38, 37]. Prion infectivity has been recovered from soil more than two years after experimental exposure to prions, suggesting the soil may serve as a reservoir for CWD prions [75]. Taken together, these results indicate that there may even be multiple sources for CWD exposure, perhaps through direct contact and environmental routes.
Significant challenges to CWD eradication exist in free-ranging cervids. Infected deer and elk range over a broad geographic region, and even previously surmised geographic barriers such as the Continental Divide have proven passable by infected animals. Ridding the environment of CWD-contaminated soil or even CWD-infected carcasses is not possible.
Moreover, the available ante-mortem diagnostic tests for surveillance are laborious and impractical for large numbers of free-ranging animals [74, 88, 95]. Therefore for a wildlife manager, this disease is costly to survey and difficult to control.
12. Conclusion
CWD in cervids is efficiently transmitted, likely more than any other TSE in animals or humans. Therefore, it is unlikely that this TSE can be eradicated, but perhaps through an improved understanding of transmission routes, biological factors influencing pathogenesis, and the molecular basis of CWD prion conversion, a targeted strategy for interrupting disease spread may be developed.
Acknowledgements
I thank Drs. Michael Miller, Jason Bartz and Mathias Heikenwalder for critical review of the manuscript.
snip...see full text 19 pages ;
http://www.vetres.org/index.php?option=article&access=standard&Itemid=129&url=/a
Research Project: Strain Typing of Chronic Wasting Disease (Cwd) and Scrapie by Intracerebral Inoculation into Transgenic and Inbred Mouse Lines
Location: Animal Diseases Research
Project Number: 5348-32000-026-07
Project Type: Specific C/A
Start Date: Sep 28, 2007
End Date: Sep 27, 2012
Objective:
To identify and differentiate typical and atypical case samples of CWD and Scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice.
Approach:
Tissue samples from deer, elk, sheep and goats with Transmissible Spongiform Encephalopathy (TSE) will be administered to mice by intracerebral injection. Multiple tissue types will be included, such as samples of brain, lymph node, blood, urine, feces, antler velvet and muscle. Mouse models used as recipient hosts will include both preexisting and recently created transgenic and inbred mouse lines. Recipient mouse phenotype will be evaluated by measuring clinical response, population disease rate, incubation time, and pathologic profile within the central nervous system (CNS). Pathologic profile of CNS lesion foci is assessed by evaluating anatomic localization, spongiform change, astrocytic gliosis, and deposition of protease resistant prion protein. BSL-1; 9-4-06. Documents SCA with U. of WA.
http://www.ars.usda.gov/research/projects/projects.htm?accn_no=411895
Research Project: Strain Typing of Chronic Wasting Disease (Cwd) and Scrapie by Intracerebral Inoculation into Transgenic and Inbred Mouse Lines
Location: Animal Diseases Research
2007 Annual Report
1a.Objectives (from AD-416)
To identify and differentiate typical and atypical case samples of CWD and Scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice.
1b.Approach (from AD-416)
Tissue samples from deer, elk, sheep and goats with Transmissible Spongiform Encephalopathy (TSE) will be administered to mice by intracerebral injection. Multiple tissue types will be included, such as samples of brain, lymph node, blood, urine, feces, antler velvet and muscle. Mouse models used as recipient hosts will include both preexisting and recently created transgenic and inbred mouse lines. Recipient mouse phenotype will be evaluated by measuring clinical response, population disease rate, incubation time, and pathologic profile within the central nervous system (CNS). Pathologic profile of CNS lesion foci is assessed by evaluating anatomic localization, spongiform change, astrocytic gliosis, and deposition of protease resistant prion protein. BSL-1; 9-4-06. Documents SCA with U. of WA.
3.Progress Report
This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Washington. Additional details of research can be found in the report for the parent project 5348-32000-026-00D Transmissible Spongiform Encephalopathies: the role of genetics, strain variation, and environmental contamination in disease control. The purpose of this new SCA is to identify and differentiate typical and atypical case samples of CWD and scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice. There will be weekly interactions between the ADODR, ADRU scientists and University of Washington collaborators through personnel visits, conference calls and emails.
http://www.ars.usda.gov/research/projects/projects.htm?ACCN_NO=411895&showpars=t
Chronic Wasting Disease and Potential Transmission to Humans
Ermias D. Belay,* Ryan A. Maddox,* Elizabeth S. Williams,† Michael W. Miller,‡ Pierluigi Gambetti,§ and Lawrence B. Schonberger*
*Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †University of Wyoming, Laramie, Wyoming, USA; ‡Colorado Division of Wildlife, Fort Collins, Colorado, USA; and §Case Western Reserve University, Cleveland, Ohio, USA
Suggested citation for this article: Belay ED, Maddox RA, Williams ES, Miller MW, Gambetti P, Schonberger LB. Chronic wasting disease and potential transmission to humans. Emerg Infect Dis [serial on the Internet]. 2004 Jun [date cited]. Available from:http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
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Chronic wasting disease (CWD) of deer and elk is endemic in a tri-corner area of Colorado, Wyoming, and Nebraska, and new foci of CWD have been detected in other parts of the United States. Although detection in some areas may be related to increased surveillance, introduction of CWD due to translocation or natural migration of animals may account for some new foci of infection. Increasing spread of CWD has raised concerns about the potential for increasing human exposure to the CWD agent. The foodborne transmission of bovine spongiform encephalopathy to humans indicates that the species barrier may not completely protect humans from animal prion diseases. Conversion of human prion protein by CWD-associated prions has been demonstrated in an in vitro cell-free experiment, but limited investigations have not identified strong evidence for CWD transmission to humans. More epidemiologic and laboratory studies are needed to monitor the possibility of such transmissions.
snip...full text ;
http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
Volume 12, Number 10–October 2006
Research
Human Prion Disease and Relative Risk Associated with Chronic Wasting Disease
Samantha MaWhinney,* W. John Pape,† Jeri E. Forster,* C. Alan Anderson,‡§ Patrick Bosque,‡¶ and Michael W. Miller#
*University of Colorado at Denver and Health Sciences Center, Denver, Colorado, USA; †Colorado Department of Public Health and Environment, Denver, Colorado, USA; ‡University of Colorado School of Medicine, Denver, Colorado, USA; §Denver Veteran's Affairs Medical Center, Denver, Colorado, USA; ¶Denver Health Medical Center, Denver, Colorado, USA; and #Colorado Division of Wildlife, Fort Collins, Colorado, USA
Suggested citation for this article
The transmission of the prion disease bovine spongiform encephalopathy (BSE) to humans raises concern about chronic wasting disease (CWD), a prion disease of deer and elk. In 7 Colorado counties with high CWD prevalence, 75% of state hunting licenses are issued locally, which suggests that residents consume most regionally harvested game. We used Colorado death certificate data from 1979 through 2001 to evaluate rates of death from the human prion disease Creutzfeldt-Jakob disease (CJD). The relative risk (RR) of CJD for CWD-endemic county residents was not significantly increased (RR 0.81, 95% confidence interval [CI] 0.40–1.63), and the rate of CJD did not increase over time (5-year RR 0.92, 95% CI 0.73–1.16). In Colorado, human prion disease resulting from CWD exposure is rare or nonexistent. However, given uncertainties about the incubation period, exposure, and clinical presentation, the possibility that the CWD agent might cause human disease cannot be eliminated.
snip... full text ;
http://0-www.cdc.gov.mill1.sjlibrary.org/ncidod/EID/vol12no10/06-0019.htm
full text ;
http://chronic-wasting-disease.blogspot.com/2006_12_01_archive.html
CWD
http://chronic-wasting-disease.blogspot.com/
CJD QUESTIONNAIRE
http://cjdquestionnaire.blogspot.com/
Monitoring the occurrence of emerging forms of CJD
http://cjdusa.blogspot.com/
Singeltary, Sr et al. JAMA.2001; 285: 733-734.
Diagnosis and Reporting of Creutzfeldt-Jakob Disease
Since this article does not have an abstract, we have provided the first 150
words of the full text and any section headings.
To the Editor:
In their Research Letter, Dr Gibbons and colleagues1 reported that the
annual US death rate due to Creutzfeldt-Jakob disease (CJD) has been stable
since 1985. These estimates, however, are based only on reported cases, and
do not include misdiagnosed or preclinical cases. It seems to me that
misdiagnosis alone would drastically change these figures. An unknown number
of persons with a diagnosis of Alzheimer disease in fact may have CJD,
although only a small number of these patients receive the postmortem
examination necessary to make this diagnosis. Furthermore, only a few states
have made CJD reportable. Human and animal transmissible spongiform
encephalopathies should be reportable nationwide and internationally.
Terry S. Singeltary, Sr
Bacliff, Tex
1. Gibbons RV, Holman RC, Belay ED, Schonberger LB. Creutzfeldt-Jakob
disease in the United States: 1979-1998. JAMA. 2000;284:2322-2323. FREE FULL
TEXT
http://jama.ama-assn.org/cgi/content/extract/285/6/733?maxtoshow=&HITS=10&hits=1
JOURNAL OF NEUROLOGY
MARCH 26, 2003
In light of the findings of Asante and Collinge et al, there
should be drastic measures to safeguard the medical and surgical arena
from sporadic CJDs and all human TSEs. I only ponder how many sporadic
CJDs in the USA are type 2 PrPSc?
http://www.neurology.org/cgi/eletters/60/2/176#535
Saturday, January 24, 2009
Research Project: Detection of TSE Agents in Livestock, Wildlife, Agricultural Products, and the Environment Location: 2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/research-project-detection-of-tse.html
Saturday, January 24, 2009 Bovine Spongiform Encephalopathy h-BSE ATYPICAL USA 2008 Annual Report Research Project: Study of Atypical Bse
Location: Virus and Prion Diseases of Livestock
2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/bovine-spongiform-encephalopathy-h-bse.html
Wednesday, January 28, 2009 TAFS1 Position Paper on Specified Risk Materials (January, 2009)
TAFS INTERNATIONAL FORUM FOR TRANSMISSIBLE ANIMAL DISEASES AND FOOD SAFETY a non-profit Swiss Foundation
(January 2009)
TAFS1 Position Paper on Specified Risk Materials
http://madcowspontaneousnot.blogspot.com/2009/01/tafs1-position-paper-on-specified-risk.html
Wednesday, January 28, 2009 TAFS1 Position Paper on BSE in small ruminants (January 2009)
http://scrapie-usa.blogspot.com/2009/01/tafs1-position-paper-on-bse-in-small.html
Monday, September 1, 2008 RE-FOIA OF DECLARATION OF EXTRAORDINARY EMERGENCY BECAUSE OF AN ATYPICAL T.S.E. (PRION DISEASE) OF FOREIGN ORIGIN IN THE UNITED STATES [No. 00-072-1] September 1, 2008
http://foiamadsheepmadrivervalley.blogspot.com/2008/09/re-foia-of-declaration-of-extraordinary.html
-------- Original Message --------
Subject: DOCKET-- 03D-0186 -- FDA Issues Draft Guidance on Use of Material From Deer and Elk in Animal Feed; Availability Date: Fri, 16 May 2003 11:47:37 -0500 From: "Terry S. Singeltary Sr." <mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:flounder@wt.net> To: mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:fdadockets@oc.fda.gov
Greetings FDA,
i would kindly like to comment on; Docket 03D-0186FDA Issues Draft Guidance on Use of Material From Deer and Elk in Animal Feed; Availability Several factors on this apparent voluntary proposal disturbs me greatly, please allow me to point them out;
1. MY first point is the failure of the partial ruminant-to-ruminant feed ban of 8/4/97. this partial and voluntary feed ban of some ruminant materials being fed back to cattle is terribly flawed. without the_total_ and _mandatory_ ban of all ruminant materials being fed back to ruminants including cattle, sheep, goat, deer, elk and mink, chickens, fish (all farmed animals for human/animal consumption), this half ass measure will fail terribly, as in the past decades...
2. WHAT about sub-clinical TSE in deer and elk? with the recent findings of deer fawns being infected with CWD, how many could possibly be sub-clinically infected. until we have a rapid TSE test toassure us that all deer/elk are free of disease (clinical and sub-clinical), we must ban not only documented CWD infected deer/elk, but healthyones as well. it this is not done, they system will fail...
3. WE must ban not only CNS (SRMs specified risk materials), but ALL tissues. recent new and old findings support infectivity in the rump or ass muscle. wether it be low or high, accumulation will play a crucial role in TSEs.
4. THERE are and have been for some time many TSEs in theUSA. TME in mink, Scrapie in Sheep and Goats, and unidentified TSE in USA cattle. all this has been proven, but the TSE in USA cattle has been totally ignored for decades. i will document this data below in my references.
5. UNTIL we ban all ruminant by-products from being fed back to ALL ruminants, until we rapid TSE test (not only deer/elk) but cattle in sufficient numbers to find (1 million rapid TSE test in USA cattle annually for 5 years), any partial measures such as the ones proposed while ignoring sub-clinical TSEs and not rapid TSE testing cattle, not closing down feed mills that continue to violate the FDA's BSE feed regulation (21 CFR 589.2000) and not making freely available those violations, will only continue to spread theseTSE mad cow agents in the USA.
I am curious what we will call a phenotype in a species that is mixed with who knows how many strains of scrapie, who knows what strain or how many strains of TSE in USA cattle, and the CWD in deer and elk (no telling how many strains there), but all of this has been rendered for animal feeds in the USA for decades. it will get interesting once someone starts looking in all species, including humans here in theUSA, but this has yet to happen...
6. IT is paramount that CJD be made reportable in every state (especially ''sporadic'' cjd), and that a CJD Questionnaire must be issued to every family of a victim of TSE. only checking death certificates will not be sufficient. this has been proven as well (see below HISTORY OF CJD -- CJD QUESTIONNAIRE)
7. WE must learn from our past mistakes, not continue to make the same mistakes...
references
snip...
Oral transmission and early lymphoid tropism of chronic wasting diseasePrPres in mule deer fawns (Odocoileus hemionus )
Christina J. Sigurdson1, Elizabeth S. Williams2, Michael W. Miller3,Terry R. Spraker1,4, Katherine I. O'Rourke5 and Edward A. Hoover1Department of Pathology, College of Veterinary Medicine and BiomedicalSciences, Colorado State University, Fort Collins, CO 80523- 1671, USA1Department of Veterinary Sciences, University of Wyoming, 1174 SnowyRange Road, University of Wyoming, Laramie, WY 82070, USA 2Colorado Division of Wildlife, Wildlife Research Center, 317 WestProspect Road, Fort Collins, CO 80526-2097, USA3Colorado State University Veterinary Diagnostic Laboratory, 300 WestDrake Road, Fort Collins, CO 80523-1671, USA4Animal Disease Research Unit, Agricultural Research Service, USDepartment of Agriculture, 337 Bustad Hall, Washington State University,Pullman, WA 99164-7030, USA5Author for correspondence: Edward Hoover.Fax +1 970 491 0523. mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:e-mailehoover@lamar.colostate.eduMule
deer fawns (Odocoileus hemionus) were inoculated orally with abrain homogenate prepared from mule deer with naturally occurring chronic wasting disease (CWD), a prion-induced transmissible spongiform encephalopathy. Fawns were necropsied and examined for PrP res, the abnormal prion protein isoform, at 10, 42, 53, 77, 78 and 80 days post-inoculation (p.i.) using an immunohistochemistry assay modified to enhance sensitivity. PrPres was detected in alimentary-tract-associatedl ymphoid tissues (one or more of the following: retropharyngeal lymphnode, tonsil, Peyer's patch and ileocaecal lymph node) as early as 42days p.i. and in all fawns examined thereafter (53 to 80 days p.i.). No PrPres staining was detected in lymphoid tissue of three control fawns receiving a control brain inoculum, nor was PrPres detectable in neural tissue of any fawn. PrPres-specific staining was markedly enhanced by sequential tissue treatment with formic acid, proteinase K and hydrated autoclaving prior to immunohistochemical staining with monoclonalantibody F89/160.1.5. These results indicate that CWD PrP res can be detected in lymphoid tissues draining the alimentary tract within a few weeks after oral exposure to infectious prions and may reflect the initial pathway of CWD infection in deer. The rapid infection of deer fawns following exposure by the most plausible natural route is consistent with the efficient horizontal transmission of CWD in nature and enables accelerated studies of transmission and pathogenesis in the native species.
snip...
These results indicate that mule deer fawns develop detectable PrPres after oral exposure to an inoculum containing CWD prions. In the earliest post-exposure period, CWD PrPres was traced to the lymphoidtissues draining the oral and intestinal mucosa (i.e. there tropharyngeal lymph nodes, tonsil, ileal Peyer's patches and ileocaecal lymph nodes), which probably received the highest initial exposure to the inoculum. Hadlow et al. (1982) demonstrated scrapie agent in the tonsil, retropharyngeal and mesenteric lymph nodes, ileumand spleen in a 10-month-old naturally infected lamb by mouse bioassay. Eight of nine sheep had infectivity in the retropharyngeal lymph node.He concluded that the tissue distribution suggested primary infection via the gastrointestinal tract. The tissue distribution of PrPres in the early stages of infection in the fawns is strikingly similar to that seen in naturally infected sheep with scrapie. These findings supportoral exposure as a natural route of CWD infection in deer and supportoral inoculation as a reasonable exposure route for experimental studies of CWD.
snip...
http://vir.sgmjournals.org/cgi/content/full/80/10/2757
===================================
now, just what is in that deer feed? _ANIMAL PROTEIN_
Subject: MAD DEER/ELK DISEASE AND POTENTIAL SOURCES
Date: Sat, 25 May 2002 18:41:46 -0700 From: "Terry S. Singeltary Sr." Reply-To: BSE-LTo: BSE-L
8420-20.5% Antler DeveloperFor Deer and Game in the wildGuaranteed Analysis Ingredients / Products Feeding Directions
snip...
_animal protein_
http://www.surefed.com/deer.htm
BODE'S GAME FEED SUPPLEMENT #400A RATION FOR DEERNET WEIGHT 50 POUNDS22.6 KG.
snip...
_animal protein_
http://www.bodefeed.com/prod7.htm
IngredientsGrain Products, Plant Protein Products, Processed Grain By-Products,Forage Products, Roughage Products 15%, Molasses Products,
__Animal Protein Products__,
Monocalcium Phosphate, Dicalcium Pyosphate, Salt,Calcium Carbonate, Vitamin A Acetate with D-activated Animal Sterol(source of Vitamin D3), Vitamin E Supplement, Vitamin B12 Supplement,Riboflavin Supplement, Niacin Supplement, Calcium Panothenate, CholineChloride, Folic Acid, Menadione Soduim Bisulfite Complex, PyridoxineHydorchloride, Thiamine Mononitrate, d-Biotin, Manganous Oxide, ZincOxide, Ferrous Carbonate, Calcium Iodate, Cobalt Carbonate, DriedSacchoromyces Berevisiae Fermentation Solubles, Cellulose gum,Artificial Flavors added.http://www.bodefeed.com/prod6.htm
===================================
MORE ANIMAL PROTEIN PRODUCTS FOR DEER
Bode's #1 Game PelletsA RATION FOR DEERF3153GUARANTEED ANALYSISCrude Protein (Min) 16%Crude Fat (Min) 2.0%Crude Fiber (Max) 19%Calcium (Ca) (Min) 1.25%Calcium (Ca) (Max) 1.75%Phosphorus (P) (Min) 1.0%Salt (Min) .30%Salt (Max) .70%IngredientsGrain Products, Plant Protein Products, Processed Grain By-Products,Forage Products, Roughage Products, 15% Molasses Products,
__Animal Protein Products__,
Monocalcium Phosphate, Dicalcium Phosphate, Salt,Calcium Carbonate, Vitamin A Acetate with D-activated Animal Sterol(source of Vitamin D3) Vitamin E Supplement, Vitamin B12 Supplement,Roboflavin Supplement, Niacin Supplement, Calcium Pantothenate, CholineChloride, Folic Acid, Menadione Sodium Bisulfite Complex, PyridoxineHydrochloride, Thiamine Mononitrate, e - Biotin, Manganous Oxide, ZincOxide, Ferrous Carbonate, Calcium Iodate, Cobalt Carbonate, DriedSaccharyomyces Cerevisiae Fermentation Solubles, Cellulose gum,Artificial Flavors added.FEEDING DIRECTIONSFeed as Creep Feed with Normal Diet
http://www.bodefeed.com/prod8.htm
INGREDIENTS
Grain Products, Roughage Products (not more than 35%), Processed GrainBy-Products, Plant Protein Products, Forage Products,
__Animal Protein Products__,
L-Lysine, Calcium Carbonate, Salt, Monocalcium/DicalciumPhosphate, Yeast Culture, Magnesium Oxide, Cobalt Carbonate, BasicCopper Chloride, Manganese Sulfate, Manganous Oxide, Sodium Selenite,Zinc Sulfate, Zinc Oxide, Sodium Selenite, Potassium Iodide,Ethylenediamine Dihydriodide, Vitamin E Supplement, Vitamin ASupplement, Vitamin D3 Supplement, Mineral Oil, Mold Inhibitor, CalciumLignin Sulfonate, Vitamin B12 Supplement, Menadione Sodium BisulfiteComplex, Calcium Pantothenate, Riboflavin, Niacin, Biotin, Folic Acid,Pyridoxine Hydrochloride, Mineral Oil, Chromium Tripicolinate
DIRECTIONS FOR USE
Deer Builder Pellets is designed to be fed to deer under rangeconditions or deer that require higher levels of protein. Feed to deerduring gestation, fawning, lactation, antler growth and pre-rut, allphases which require a higher level of nutrition. Provide adequateamounts of good quality roughage and fresh water at all times.
http://www.profilenutrition.com/Products/Specialty/deer_builder_pellets.html
===================================================
DEPARTMENT OF HEALTH & HUMAN SERVICESPUBLIC HEALTH SERVICEFOOD AND DRUG ADMINISTRATIONApril 9, 2001 WARNING LETTER01-PHI-12CERTIFIED MAILRETURN RECEIPT REQUESTED
Brian J. Raymond, Owner Sandy Lake Mills 26 Mill Street P.O. Box 117 Sandy Lake, PA 16145
PHILADELPHIA DISTRICT
Tel: 215-597-4390
Dear Mr. Raymond:Food and Drug Administration Investigator Gregory E. Beichner conducted an inspection of your animal feed manufacturing operation, located in Sandy Lake, Pennsylvania, on March 23,2001, and determined that your firm manufactures animal feeds including feeds containing prohibited materials. The inspection found significant deviations from the requirements set forth in Title 21, code of Federal Regulations, part 589.2000 - Animal Proteins Prohibited in Ruminant Feed. The regulation is intended to prevent the establishment and amplification of Bovine Spongiform Encephalopathy (BSE) . Such deviations cause products being manufactured at this facility to be misbranded within the meaning of Section 403(f), of the Federal Food, Drug, and Cosmetic Act (the Act).Our investigation found failure to label your swine feed with the required cautionary statement "Do Not Feed to cattleor other Ruminants" The FDA suggests that the statement be distinguished by different type-size or color or other means of highlighting the statement so that it is easily noticed by a purchaser.
In addition, we note that you are using approximately 140 pounds of cracked corn to flush your mixer used in the manufacture of animal feeds containing prohibited material. This flushed material is fed to wild game including deer, a ruminant animal.Feed material which may potentially contain prohibited material should not be fed to ruminant animals which may become part of the food chain.The above is not intended to be an all-inclusive list of deviations fromthe regulations. As a manufacturer of materials intended for animalfeed use, you are responsible for assuring that your overall operation and the products you manufacture and distribute are in compliance withthe law. We have enclosed a copy of FDA's Small Entity Compliance Guideto assist you with complying with the regulation... blah, blah, blah...
http://www.fda.gov/foi/warning_letters/g1115d.pdf
==================================
snip...end...full text ;
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 1 Terry S. Singeltary Sr. Vol #: 1
http://www.fda.gov/ohrms/dockets/dailys/03/Jun03/060903/060903.htm
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 7 Terry S. Singeltary Sr. Vol #: 1
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 7 Terry S. Singeltary Sr. Vol #: 1
http://www.fda.gov/ohrms/dockets/dailys/03/oct03/100203/100203.htm
01N-0423 Substances Prohibited from use in animal food/Feed Ruminant
APE 5 National Renderers Association, Inc. Vol#: 2
APE 6 Animal Protein Producers Industry Vol#: 2
APE 7 Darling International Inc. Vol#: 2
EMC 1 Terry S. Singeltary Sr. Vol#: 3
http://www.fda.gov/ohrms/dockets/dailys/01/Oct01/101501/101501.htm
snip...end
Tuesday, January 06, 2009
CWD Update 93 December 29, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-update-93-december-29-2008.html
Tuesday, January 13, 2009
Antemortem detection of PrPCWD in preclinical, ranch-raised Rocky Mountain elk (Cervus elaphus nelsoni) by biopsy of the rectal mucosa Full Scientific Reports
http://chronic-wasting-disease.blogspot.com/2009/01/antemortem-detection-of-prpcwd-in.html
Saturday, January 10, 2009
Chronic Wasting Disease Investigation Update Michigan December 18, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/chronic-wasting-disease-investigation.html
Sunday, September 07, 2008
CWD LIVE TEST, and the political aspects or fallout of live testing for BSE in cattle in the USA
http://chronic-wasting-disease.blogspot.com/2008/09/cwd-live-test-and-political-aspects-or.html
2008 CWD Laboratory Testing for Wild White-tailed Deer
http://www.michigan.gov/emergingdiseases/0,1607,7-186-25806-202922--,00.html
Wednesday, January 07, 2009
CWD to tighten taxidermy rules Hunters need to understand regulations
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-to-tighten-taxidermy-rules-hunters.html
Monday, January 05, 2009
CWD, GAME FARMS, BAITING, AND POLITICS
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-game-farms-baiting-and-politics.html
Thursday, December 25, 2008 Lions and Prions and Deer Demise
http://chronic-wasting-disease.blogspot.com/2008/12/lions-and-prions-and-deer-demise.html
Tuesday, January 06, 2009
CWD Update 93 December 29, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-update-93-december-29-2008.html
Tuesday, September 09, 2008 CWD MICHIGAN UPDATE September 5, 2008
http://chronic-wasting-disease.blogspot.com/2008/09/cwd-michigan-update-september-5-2008.html
Monday, August 25, 2008 CWD FIRST DOCUMENTED IN MICHIGAN
http://chronic-wasting-disease.blogspot.com/2008/08/cwd-first-documented-in-michigan.html
Saturday, January 24, 2009
Research Project: Detection of TSE Agents in Livestock, Wildlife, Agricultural Products, and the Environment Location: 2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/research-project-detection-of-tse.html
Wednesday, February 04, 2009 Nebraska reports 22 cases of CWD in deer
http://chronic-wasting-disease.blogspot.com/2009/02/nebraska-reports-22-cases-of-cwd-in.html
TSS
Mon, 09 Feb 2009 14:25:00 -0600
http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Exotic Meats USA of San Antonio, TX is initiating a voluntary recall of Elk Tenderloin because it may contain meat derived from an elk confirmed to have Chronic Wasting Disease (CWD). The meat with production dates of December 29, 30 and 31, 2008 was purchased from Sierra Meat Company in Reno, NV. The infected elk came from Elk Farm LLC in Pine Island, MN and was among animals slaughtered and processed at USDA facility Noah's Ark Processors LLC.
http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Recall -- Firm Press Release FDA posts press releases and other notices of recalls and market withdrawals from the firms involved as a service to consumers, the media, and other interested parties. FDA does not endorse either the product or the company.
Exotic Meats USA Announces Urgent Statewide Recall of Elk Tenderloin Because It May Contain Meat Derived From An Elk Confirmed To Have Chronic Wasting Disease Contact: Exotic Meats USA 1-800-680-4375
FOR IMMEDIATE RELEASE -- February 9, 2009 -- Exotic Meats USA of San Antonio, TX is initiating a voluntary recall of Elk Tenderloin because it may contain meat derived from an elk confirmed to have Chronic Wasting Disease (CWD). The meat with production dates of December 29, 30 and 31, 2008 was purchased from Sierra Meat Company in Reno, NV. The infected elk came from Elk Farm LLC in Pine Island, MN and was among animals slaughtered and processed at USDA facility Noah’s Ark Processors LLC.
Chronic Wasting Disease (CWD) is a fatal brain and nervous system disease found in elk and deer. The disease is caused by an abnormally shaped protein called a prion, which can damage the brain and nerves of animals in the deer family. Currently, it is believed that the prion responsible for causing CWD in deer and elk is not capable of infecting humans who eat deer or elk contaminated with the prion, but the observation of animal-to-human transmission of other prion-mediated diseases, such as bovine spongiform encephalopathy (BSE), has raised a theoretical concern regarding the transmission of CWD from deer or elk to humans. At the present time, FDA believes the risk of becoming ill from eating CWD-positive elk or deer meat is remote. However, FDA strongly advises consumers to return the product to the place of purchase, rather than disposing of it themselves, due to environmental concerns.
Exotic Meats USA purchased 1 case of Elk Tenderloins weighing 16.9 lbs. The Elk Tenderloin was sold from January 16 – 27, 2009. The Elk Tenderloins was packaged in individual vacuum packs weighing approximately 3 pounds each. A total of six packs of the Elk Tenderloins were sold to the public at the Exotic Meats USA retail store. Consumers who still have the Elk Tenderloins should return the product to Exotic Meats USA at 1003 NE Loop 410, San Antonio, TX 78209. Customers with concerns or questions about the Voluntary Elk Recall can call 1-800-680-4375. The safety of our customer has always been and always will be our number one priority.
Exotic Meats USA requests that for those customers who have products with the production dates in question, do not consume or sell them and return them to the point of purchase. Customers should return the product to the vendor. The vendor should return it to the distributor and the distributor should work with the state to decide upon how best to dispose. If the consumer is disposing of the product he/she should consult with the local state EPA office.
#
http://www.fda.gov/oc/po/firmrecalls/exoticmeats02_09.html
Cross-sequence transmission of sporadic Creutzfeldt-Jakob disease creates a new prion strain
Date: August 25, 2007 at 12:42 pm PST
our results raise the possibility that CJD cases classified as VV1 may include cases caused by iatrogenic transmission of sCJD-MM1 prions or food-borne infection by type 1 prions from animals, e.g., chronic wasting disease prions in cervid. In fact, two CJD-VV1 patients who hunted deer or consumed venison have been reported (40, 41). The results of the present study emphasize the need for traceback studies and careful re-examination of the biochemical properties of sCJD-VV1 prions.
http://www.jbc.org/
snip...
Clearly, it is premature to draw firm conclusions about CWD passing naturally into humans, cattle and sheep, but the present results suggest that CWD transmissions to humans would be as limited by PrP incompatibility as transmissions of BSE or sheep scrapie to humans. Although there is no evidence that sheep scrapie has affected humans, it is likely that BSE has caused variant CJD in 74 people (definite and probable variant CJD cases to date according to the UK CJD Surveillance Unit). Given the presumably large number of people exposed to BSE infectivity, the susceptibility of humans may still be very low compared with cattle, which would be consistent with the relatively inefficient conversion of human PrP-sen by PrPBSE. Nonetheless, since humans have apparently been infected by BSE, it would seem prudent to take reasonable measures to limit exposure of humans (as well as sheep and cattle) to CWD infectivity as has been recommended for other animal TSEs.
snip...
http://www.emboj.org/current.shtml
snip
http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
From: TSS (216-119-163-189.ipset45.wt.net) Subject: CWD aka MAD DEER/ELK TO HUMANS ??? Date: September 30, 2002 at 7:06 am PST
From: "Belay, Ermias" To: Cc: "Race, Richard (NIH)" ; ; "Belay, Ermias" Sent: Monday, September 30, 2002 9:22 AM Subject: RE: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS
Dear Sir/Madam, In the Archives of Neurology you quoted (the abstract of which was attached to your email), we did not say CWD in humans will present like variant CJD.
That assumption would be wrong. I encourage you to read the whole article and call me if you have questions or need more clarification (phone: 404-639-3091). Also, we do not claim that "no-one has ever been infected with prion disease from eating venison." Our conclusion stating that we found no strong evidence of CWD transmission to humans in the article you quoted or in any other forum is limited to the patients we investigated.
Ermias Belay, M.D. Centers for Disease Control and Prevention
-----Original Message----- From: Sent: Sunday, September 29, 2002 10:15 AM To: [log in to unmask]">[log in to unmask]; [log in to unmask]">[log in to unmask]; [log in to unmask]">[log in to unmask] Subject: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS
Sunday, November 10, 2002 6:26 PM ......snip........end..............TSS
also,
A. Aguzzi - Chronic Wasting Disease (CWD) also needs to be addressed. Most serious because of rapid horizontal spread and higher prevalence than BSE in UK, up to 15% in some populations. Also may be a risk to humans - evidence that it is not dangerous to humans is thin.
http://www.tseandfoodsafety.org/activities/bse_conference_basel_april_02/2summar
http://chronic-wasting-disease.blogspot.com/2008/08/cwd-stakeholder-advisory-group.html
The following paper published in the November issue of the Journal of Virology reports experimental transmission of Chronic Wasting Disease (CWD) prions to a primate species. The paper is entitled Interspecies Transmission of Chronic Wasting Disease Prions to Squirrel Monkeys (_Saimiri sciureus_). The authors are: Richard F. Marsh (1) (Deceased), Anthony E. Kincaid (2), Richard A. Bessen (3), and Jason C. Bartz(4)*, at the Department of Animal Health and Biomedical Sciences, University of Wisconsin, Madison 53706(1), Department of Physical Therapy(2), Department of Medical Microbiology and Immunology, Creighton University, Omaha, Nebraska 68178(4), Department of Veterinary Molecular Biology, Montana State University, Bozeman, Montana 59718(3).
The Abstract reads as follows: "Chronic wasting disease (CWD) is an emerging prion disease of deer and elk. The risk of CWD transmission to humans following exposure to CWD-infected tissues is unknown. To assess the susceptibility of nonhuman primates to CWD, 2 squirrel monkeys were inoculated with brain tissue from a CWD-infected mule deer. The CWD-inoculated squirrel monkeys developed a progressive neurodegenerative disease and were euthanized at 31 and 34 months postinfection. Brain tissue from the CWD-infected squirrel monkeys contained the abnormal isoform of the prion protein, PrP-res, and displayed spongiform degeneration. This is the 1st reported transmission of CWD to primates."
http://apex.oracle.com/pls/otn/f?p=2400:1001:265605120839108489::::F2400_P1001_BACK_PAGE,F2400_P1001_ARCHIVE_NUMBER,F2400_P1001_USE_ARCHIVE:1202,20051108.3270,Y
P01.47 Quantifying the Species Barrier in Chronic Wasting Disease by a Novel invitro Conversion Assay
Li, L1; Coulthart, MB2; Balachandran, A3; Chakrabartty, A4; Cashman, NR11University of British Columbia, Brain Research Centre, Canada; 2PublicHealth Agencyof Canada, National Microbiology Laboratory, Canada; 3Animal DiseasesResearch Institute, Canada Food Inspection Agency, National ReferenceLaboratory forScrapie and CWD, Canada; 4Ontario Cancer Institute and Department of MedicalBiophysics, University of Toronto, Canada
Background: Chronic wasting disease (CWD) is a transmissible spongiformencephalopathy that can affect North American cervids (deer, elk, andmoose).Although the risk of CWD crossing the species barrier and causing humandisease is still unknown, however, definite bovine spongiform encephalopathy(BSE)transmission to humans as variant CJD (vCJD), it would seem prudent to limitthe exposure of humans to CWD.Aim: In view of the fact that BSE can be readily transmitted to non-bovidspecies, it is important to establish the species susceptibility range ofCWD.Methods: In vitro conversion system was performed by incubation of prionswith normal brain homogenates as described before, and protease K (PK)resistantPrP was determined by immunoblotting with 6H4 monoclonal prion antibody.Results: Our results demonstrate that PrPC from cervids (including moose)can be efficiently converted to a protease-resistant form by incubation withelkCWD prions, presumably due to sequence and structural similarities betweenthesespecies. Interestingly, hamster shows a high conversion ratio by PrPCWD.Moreover,partial denaturation of substrate PrPC can apparently overcome thestructuralbarriers between more distant species.Conclusions: Our work correctly predicted the transmission of CWD to a wildmoose.We find a species barrier for prion protein conversion between cervids andother species, however, this barrier might be overcome if the PrPC substratehasbeen partially denatured in a cellular environment. Such an environmentmightalso promote CWD transmission to non-cervid species, *** including humans. Acid/GdnHCl-treated brain PrPC was a superior substrate for the in vitroconversion than PrPC treated at physiological pH. This has implications forthe processby which the prion protein is converted in disease.
http://www.prion2007.com/pdf/Prion%20Book%20of%20Abstracts.pdf
North American Cervids Harbor Two Distinct CWD Strains
Authors
Angers, R. Seward, T, Napier, D., Browning, S., Miller, M., Balachandran A., McKenzie, D., Hoover, E., Telling, G. 'University of Kentucky; Colorado Division of Wildlife, Canadian Food Inspection Agency; University Of Wisconsin; Colorado State University.
Content
Despite the increasing geographic distribution and host range of CWD, little is known about the prion strain(s) responsible for distinct outbreaks of the disease. To address this we inoculated CWD-susceptible Tg(CerPrP)1536+/· mice with 29 individual prion samples from various geographic locations in North America. Upon serial passage, intrastudy incubation periods consistently diverged and clustered into two main groups with means around 210 and 290 days, with corresponding differences in neuropathology. Prion strain designations were utilized to distinguish between the two groups: Type I CWD mice succumbed to disease in the 200 day range and displayed a symmetrical pattern of vacuolation and PrPSc deposition, whereas Type II CWD mice succumbed to disease near 300 days and displayed a strikingly different pattern characterized by large local accumulations of florid plaques distributed asymmetrically. Type II CWD bears a striking resemblance to unstable parental scrapie strains such as 87A which give rise to stable, short incubation period strains such as ME7 under certain passage conditions. In agreement, the only groups of CWD-inoculated mice with unwavering incubation periods were those with Type I CWD. Additionally, following endpoint titration of a CWD sample, Type I CWD could be recovered only at the lowest dilution tested (10-1), whereas Type II CWD was detected in mice inoculated with all dilutions resulting in disease. Although strain properties are believed to be encoded in the tertiary structure of the infectious prion protein, we found no biochemical differences between Type I and Type II CWD. Our data confirm the co·existence of two distinct prion strains in CWD-infected cervids and suggest that Type II CWD is the parent strain of Type I CWD.
see page 29, and see other CWD studies ;
http://www.neuroprion.org/resources/pdf_docs/conferences/prion2008/abstract-book-prion2008.pdf
A prion disease of cervids: Chronic wasting disease 2008Posted Jun 24 08 5:07pm 1: Vet Res. 2008 Apr 3;39(4):41
A prion disease of cervids: Chronic wasting disease
Sigurdson CJ.
The recent discovery of chronic wasting disease in cervids (CWD) beyond the borders of Colorado and Wyoming, as far east as New York and including two Canadian Provinces, has led to the emergence of CWD as a prion disease of domestic and international importance. The apparent ease of horizontal transmission, potentially via environmental contamination or by prion-containing saliva, creates enormous challenges for disease management. Ongoing studies of CWD interspecies transmission by exposure of domestic and non-domestic species directly or using transgenic mice have shed light on species barriers. Transgenic mice expressing cervid PrP have also proven useful for assessing the genetic influences of Prnp polymorphisms on CWD susceptibility. Accumulating evidence of CWD pathogenesis indicates that the misfolded prion protein, PrPSc, seems to be widely disseminated in many nonneural organs, and CWD infectivity has been recently detected in blood. This review highlights recent research findings in this disease of free-ranging wildlife.
snip...
3. CWD prion spread and target organs
Collectively, CWD pathogenesis studies have revealed extensive deposition of PrPSc in the central nervous system (CNS) and extraneural tissues (Fig. 1). The only other natural prion diseases that even approach this degree of systemic involvement are variant Creutzfeldt-Jakob disease (vCJD) in humans, sheep scrapie, and transmissible mink encephalopathy [22, 23, 30, 61, 62]. In mule deer, PrPSc is detectable in the retropharyngeal lymph node within only 6 weeks following an oral exposure [76]. In a further study of the kinetics of prion
1http://www.aphis.usda.gov/vs/nahps/cwd/cwd-distribution.html
5
infection in mule deer, Fox et al. showed that PrPSc is widely distributed in lymphoid tissues by 3 months post-oral exposure when it is first detected in brain [17]. By 9 months, PrPSc was detected in the myenteric and submucosal plexi throughout the gastrointestinal tract and in the vagus nerve, and by 16 months, PrPSc deposits were detectable throughout the brain and spinal cord. The Prnp genotype seemed to impact the infection kinetics in that mule deer that were SF heterozygous at codon 225 showed a delay in PrPSc spread; PrPSc was not
detectable in the brain until 16 months post-inoculation which was 13 months later than the 225SS deer. Perhaps the 225F allele confers a dominant negative effect on the kinetics of this CWD strain, as has been described in sheep, where the 171R allele has been shown to have a dominant negative effect on prion susceptibility [20, 33]. CWD pathogenesis seems to vary between deer and elk: PrPSc levels have been found to be lower in lymphoid tissues of elk compared to deer [66]. In a report of 226 CWD-infected elk, 28 had no PrPSc in lymphoid tissues despite having PrPSc in brain [81]. In addition to lymphoid tissues, PrPSc or infectivity has been detected in other non-CNS tissues, including pancreas [17, 77], adrenal gland [17, 77], and skeletal muscle [2]. Recently PrPSc was described in cardiac muscle from 7 of 16 (44%) white-tailed deer and from 12 of 17 (71%) elk [35]. This is the first report of PrPSc in cardiac muscle in any TSE. The cellular and molecular mechanisms of systemic prion spread are under investigation in many laboratories. A recent report showed that blood from CWD-infected deer contained infectivity and could transmit prion disease via a blood transfusion [50]. This finding recapitulates indirect findings of blood infectivity in vCJD affected humans [61] and experimental transfusion studies of scrapie sick sheep [32], and indicates that prion transport
throughout the body may include the blood as a potential vehicle.
snip...
6. CWD strains among deer and elk
Prion strains, such as those seen in sheep scrapie, show distinct incubation periods in differentially susceptible inbred mice and lesions target discrete brain regions [11, 18, 19]. CWD in deer and elk has been considered a single disease entity, and western blot glycoform patterns of PrPSc are similar among deer and elk [67]. However, some new data indicate otherwise, suggesting that conformational variants, or strains, may exist. In a study by Raymond et al., Syrian golden hamsters were infected with mule deer or elk CWD, but with an incomplete attack rate; only 2 of 7 and 0 of 7 hamsters developed terminal disease, respectively. Indeed, second and third passage of the mule deer derived strain resulted in a short incubation period of only 85-89 days, whereas the elk-derived strain led to an incubation period of 408-544 days. Surprisingly, when mule deer CWD was first passaged in hamster PrP expressing transgenic mice and then into hamsters, a slowly replicating strain
with distinct clinical disease and PrPSc deposition patterns in brain ensued. Therefore two different strains could be passaged from a single mule deer CWD isolate, a rapid and a slowly replicating strain with differing disease phenotypes [70]. Alternatively, these strains could have been generated upon interspecies transmission [6].
We have also observed two strains arising from a single CWD-infected mule deer upon
passage in transgenic mice overexpressing murine PrP. Here, mice developed different
PrPSc aggregate morphologies in brain, either dense, congophilic plaques or fine, diffuse aggregates which could be selectively passaged [78]. LaFauci et al. have reported that elk PrP expressing transgenic mice developed phenotypically divergent diseases when inoculated with either mule deer or elk CWD, which was also suggestive of different strains [44]. In each of these studies, it is not clear whether mule deer and elk possess heterogeneous PrP aggregates (strain mixture), or whether the strains may have developed in the new host. However, Safar et al. have reported differing conformational characteristics for PrPSc from CWD-infected white-tailed deer and elk directly, using a conformation dependent immunoassay (CDI) [71], which supports the existence of CWD strains. The possible existence of CWD strains is perhaps not entirely surprising, considering that there are genetic Prnp differences among deer and elk that could influence PrPSc conformation [34, 36, 58].
7
7. Interspecies CWD transmission
Wild predators and scavengers are presumably feeding on CWD-infected carcasses.
Skeletal muscle has been shown to harbor CWD prion infectivity [2], underscoring that other species will almost certainly be exposed to CWD through feeding. However, CWD has not been successfully transmitted by oral inoculation to species outside of the cervid family, suggestive of a strong species barrier for heterologous PrP conversion. Ferrets (family Mustelidae) can be infected with deer CWD after intracerebral (ic) but not oral exposure [5, 80]. Raccoons resisted even ic infection for up to 2 years thus far [24]. Mountain lion (Puma concolor) susceptibility to experimental feeding of CWD prions is currently under investigation (M. Miller and L. Wolfe, personal communication).
Could wild rodents colonizing CWD- or scrapie-infected pastures serve as an environmental reservoir of prion infectivity? Interestingly, bank voles (Clethrionomys glareolus), are readily infected with CWD and sheep scrapie by intracerebral inoculation ([64]; U. Agrimi, unpublished data) and are considered as a potential reservoir for sheep scrapie [64]. Many vole species occur in North America [65, 83] and further research may determine whether voles enhance CWD or scrapie spread through environmental contamination.
Given that environmental contamination with CWD prions likely occurs [55], domestic
ruminants may be exposed to CWD through common grazing areas. However, sheep and
cattle appear to be poorly susceptible to mule deer CWD: ic inoculation with mule deer CWD succeeded to infect only 2 of 8 sheep [28]; likewise cattle have not been infected after cograzing with CWD-infected mule deer, or after a direct oral exposure (over 6 years) (M. Miller, personal communication). Even direct ic inoculation led to CWD infection in only 5 of 13 cattle (38%) after 2-5 years [26]. In contrast, cattle are highly susceptible to white-tailed deer CWD with 12 of 14 animals developing neurologic disease and PrPSc by only 22 months post-ic inoculation (+/-0.5 months) [29]. Further studies are planned to determine whether
cattle are susceptible to white-tailed deer prions after an oral exposure (J. Richt, personal communication). The differential susceptibility of cattle to CWD from mule deer versus whitetailed deer suggests that CWD strains exist, and that CWD may differentially cross species barriers depending on the strain. Nevertheless, to date, natural CWD infections have been detected only in cervids.
Is the converse true, are cervids susceptible to sheep scrapie? Only one study has been performed on cervid susceptibility to sheep scrapie by the ic route, and showed that 3 of 6 elk developed neurologic signs, spongiform encephalopathy and PrPSc in brain [25]. Further experiments to address this question may be interesting since sheep scrapie is considered a possible source for CWD in North America [89, 91].
8. Human susceptibility to CWD
Millions of North Americans hunt deer and elk (U.S. Department of the Interior, Census Bureau), and there is no doubt that people have been exposed to CWD through venison consumption, particularly in light of recent data showing CWD prions in muscle [2]. Human susceptibility to CWD or to other newly emerging animal TSE [9, 14] is still unclear, although we can be somewhat reassured in that there have been no large scale outbreaks of human TSE cases in Colorado and Wyoming, where CWD has existed for decades [51]. Up until approximately 10 years ago, autopsies were not performed on suspect human TSE cases in many states due to biosafety concerns, therefore the diagnosis of potential new TSE strains has been hampered. This indicates that clinical TSE diagnoses in humans were not confirmed, nor was any strain typing done to look for the appearance of potentially subtle or unusual pathological or biochemical phenotypes of a new TSE strain. Fortunately, the
autopsy rate for suspect cases is improving. At the National Prion Disease Pathology
Surveillance Center at Case Western Reserve University (Cleveland, Ohio), Creutzfeldt-Jakob disease (CJD) suspect cases are studied and classified by CJD subtype. Thus far,
8
*** twenty-seven CJD patients who regularly consumed venison were reported to the
Surveillance Center***,
however there have been no unusual or novel prion subtypes that might indicate the appearance of a new prion strain [7, 41]. Other indirect studies of human susceptibility to CWD also suggest that the risk is low. In biochemical conversion studies, Raymond et al. [68] showed that the efficiency of CWD to
convert recombinant human PrP into amyloid fibrils was low, but similar to that of both BSE and scrapie fibrils to do the same. These results suggest that there is a molecular incompatibility in the conversion of human PrPC by CWD, sheep scrapie, or BSE, and that cross species infections in humans may be rare events.
To determine whether common PrPSc strain features may link CWD and CJD, histopathology and the PrPSc biochemical characteristics from deer and elk were compared with that of humans with sporadic CJD (sCJD) cases that are methionine homozygous at codon 129 of the Prnp gene by Xie et al. [96], although strain features including histologic profile, target organs, and glycoform patterns will not necessarily remain the same upon crossing species barriers [6, 5, 8, 57]. The PrPSc form is cleaved by proteinase-K (PK) at different sites depending on the conformation of the protein and may aid determination of whether the PrPSc conformation is similar. By western blot (SDS-PAGE) of elk CWD, the unglycosylated
PK-resistant PrPSc migrated at 21 kDa, similar to sCJD (MM1 subtype) and the PK cleavage site was the same, occurring at residues 78 and 82 as assessed by N-terminal sequencing. Conformational stability was evaluated by measuring the PrPSc stability under partially denaturing conditions and also showed no significant difference between elk CWD and sCJD MM1 PrPSc. However, elk CWD and human sCJD MM1 strains exhibited distinct glycoform patterns by two dimensional gel electrophoresis, suggesting that the strains differed. Future studies may utilize luminescent conjugated polymers, which were recently shown to distinguish naturally- and experimentally-derived prion strains [79].
To study elk-human prion species barriers, Kong et al. inoculated elk CWD into transgenic mice expressing either human PrP or elk PrP. Whereas the elk PrP expressing mice developed disease after only 118-142 days post-inoculation, human PrP expressing mice (129M) did not develop any features of TSE after more than 657 or more than 756 days [41].
In accordance with these results, Tamgüney et al. also reported that human PrP
overexpressing mice were not susceptible to 9 CWD isolates from mule deer, white-tailed deer, and elk [84]. However, mice have a limited lifespan and further passages may be necessary to detect low levels of prion infectivity that may be present subclinically. Although indirect evidence is accumulating that there may be a robust species barrier for CWD transmission to humans, one report indicates nonhuman primate susceptibility to CWD. Intracerebral inoculation of squirrel monkeys (Saimiri sciureus) demonstrated a positive CWD transmission [49]. Among non-human primates, however, the Prnp sequence of the new world monkeys are the most distant from humans [72], and therefore may not indicate that human prion conversion would occur by CWD.
snip...
11. Disease control challenges posed by CWD
Evidence is building that indicates efficient horizontal transmission occurs in CWD, indeed a complicating aspect in disease control [91]. Potential transmission mechanisms range from spread via direct contact among animals to environmental exposure through grazing in areas contaminated by prion-infected secretions, excretions (saliva, urine, feces), tissues (placenta), or decomposed carcasses. Recently, in a breakthrough finding, saliva from CWD infected deer was shown to transmit prion disease [50]. An additional experiment by Miller and colleagues showed that CWD-infected carcasses allowed to decay naturally in confined pastures can lead to CWD infections in captive deer, demonstrating the potential for
environmental contamination to spread infection [55]. Modelling studies have provided further
10
support that environmental contamination is likely playing a significant role in transmitting CWD [56, 53]. Additionally, infectious prions have been demonstrated to bind soil particles and remain infectious to animals by both intracerebral and oral exposure routes [38, 37]. Prion infectivity has been recovered from soil more than two years after experimental exposure to prions, suggesting the soil may serve as a reservoir for CWD prions [75]. Taken together, these results indicate that there may even be multiple sources for CWD exposure, perhaps through direct contact and environmental routes.
Significant challenges to CWD eradication exist in free-ranging cervids. Infected deer and elk range over a broad geographic region, and even previously surmised geographic barriers such as the Continental Divide have proven passable by infected animals. Ridding the environment of CWD-contaminated soil or even CWD-infected carcasses is not possible.
Moreover, the available ante-mortem diagnostic tests for surveillance are laborious and impractical for large numbers of free-ranging animals [74, 88, 95]. Therefore for a wildlife manager, this disease is costly to survey and difficult to control.
12. Conclusion
CWD in cervids is efficiently transmitted, likely more than any other TSE in animals or humans. Therefore, it is unlikely that this TSE can be eradicated, but perhaps through an improved understanding of transmission routes, biological factors influencing pathogenesis, and the molecular basis of CWD prion conversion, a targeted strategy for interrupting disease spread may be developed.
Acknowledgements
I thank Drs. Michael Miller, Jason Bartz and Mathias Heikenwalder for critical review of the manuscript.
snip...see full text 19 pages ;
http://www.vetres.org/index.php?option=article&access=standard&Itemid=129&url=/a
Research Project: Strain Typing of Chronic Wasting Disease (Cwd) and Scrapie by Intracerebral Inoculation into Transgenic and Inbred Mouse Lines
Location: Animal Diseases Research
Project Number: 5348-32000-026-07
Project Type: Specific C/A
Start Date: Sep 28, 2007
End Date: Sep 27, 2012
Objective:
To identify and differentiate typical and atypical case samples of CWD and Scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice.
Approach:
Tissue samples from deer, elk, sheep and goats with Transmissible Spongiform Encephalopathy (TSE) will be administered to mice by intracerebral injection. Multiple tissue types will be included, such as samples of brain, lymph node, blood, urine, feces, antler velvet and muscle. Mouse models used as recipient hosts will include both preexisting and recently created transgenic and inbred mouse lines. Recipient mouse phenotype will be evaluated by measuring clinical response, population disease rate, incubation time, and pathologic profile within the central nervous system (CNS). Pathologic profile of CNS lesion foci is assessed by evaluating anatomic localization, spongiform change, astrocytic gliosis, and deposition of protease resistant prion protein. BSL-1; 9-4-06. Documents SCA with U. of WA.
http://www.ars.usda.gov/research/projects/projects.htm?accn_no=411895
Research Project: Strain Typing of Chronic Wasting Disease (Cwd) and Scrapie by Intracerebral Inoculation into Transgenic and Inbred Mouse Lines
Location: Animal Diseases Research
2007 Annual Report
1a.Objectives (from AD-416)
To identify and differentiate typical and atypical case samples of CWD and Scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice.
1b.Approach (from AD-416)
Tissue samples from deer, elk, sheep and goats with Transmissible Spongiform Encephalopathy (TSE) will be administered to mice by intracerebral injection. Multiple tissue types will be included, such as samples of brain, lymph node, blood, urine, feces, antler velvet and muscle. Mouse models used as recipient hosts will include both preexisting and recently created transgenic and inbred mouse lines. Recipient mouse phenotype will be evaluated by measuring clinical response, population disease rate, incubation time, and pathologic profile within the central nervous system (CNS). Pathologic profile of CNS lesion foci is assessed by evaluating anatomic localization, spongiform change, astrocytic gliosis, and deposition of protease resistant prion protein. BSL-1; 9-4-06. Documents SCA with U. of WA.
3.Progress Report
This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Washington. Additional details of research can be found in the report for the parent project 5348-32000-026-00D Transmissible Spongiform Encephalopathies: the role of genetics, strain variation, and environmental contamination in disease control. The purpose of this new SCA is to identify and differentiate typical and atypical case samples of CWD and scrapie by characterizing the biologic phenotype and pathologic profile of these agents when administered to susceptible lines of transgenic and inbred mice. There will be weekly interactions between the ADODR, ADRU scientists and University of Washington collaborators through personnel visits, conference calls and emails.
http://www.ars.usda.gov/research/projects/projects.htm?ACCN_NO=411895&showpars=t
Chronic Wasting Disease and Potential Transmission to Humans
Ermias D. Belay,* Ryan A. Maddox,* Elizabeth S. Williams,† Michael W. Miller,‡ Pierluigi Gambetti,§ and Lawrence B. Schonberger*
*Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †University of Wyoming, Laramie, Wyoming, USA; ‡Colorado Division of Wildlife, Fort Collins, Colorado, USA; and §Case Western Reserve University, Cleveland, Ohio, USA
Suggested citation for this article: Belay ED, Maddox RA, Williams ES, Miller MW, Gambetti P, Schonberger LB. Chronic wasting disease and potential transmission to humans. Emerg Infect Dis [serial on the Internet]. 2004 Jun [date cited]. Available from:http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
--------------------------------------------------------------------------------
Chronic wasting disease (CWD) of deer and elk is endemic in a tri-corner area of Colorado, Wyoming, and Nebraska, and new foci of CWD have been detected in other parts of the United States. Although detection in some areas may be related to increased surveillance, introduction of CWD due to translocation or natural migration of animals may account for some new foci of infection. Increasing spread of CWD has raised concerns about the potential for increasing human exposure to the CWD agent. The foodborne transmission of bovine spongiform encephalopathy to humans indicates that the species barrier may not completely protect humans from animal prion diseases. Conversion of human prion protein by CWD-associated prions has been demonstrated in an in vitro cell-free experiment, but limited investigations have not identified strong evidence for CWD transmission to humans. More epidemiologic and laboratory studies are needed to monitor the possibility of such transmissions.
snip...full text ;
http://www.cdc.gov/ncidod/EID/vol10no6/03-1082.htm
Volume 12, Number 10–October 2006
Research
Human Prion Disease and Relative Risk Associated with Chronic Wasting Disease
Samantha MaWhinney,* W. John Pape,† Jeri E. Forster,* C. Alan Anderson,‡§ Patrick Bosque,‡¶ and Michael W. Miller#
*University of Colorado at Denver and Health Sciences Center, Denver, Colorado, USA; †Colorado Department of Public Health and Environment, Denver, Colorado, USA; ‡University of Colorado School of Medicine, Denver, Colorado, USA; §Denver Veteran's Affairs Medical Center, Denver, Colorado, USA; ¶Denver Health Medical Center, Denver, Colorado, USA; and #Colorado Division of Wildlife, Fort Collins, Colorado, USA
Suggested citation for this article
The transmission of the prion disease bovine spongiform encephalopathy (BSE) to humans raises concern about chronic wasting disease (CWD), a prion disease of deer and elk. In 7 Colorado counties with high CWD prevalence, 75% of state hunting licenses are issued locally, which suggests that residents consume most regionally harvested game. We used Colorado death certificate data from 1979 through 2001 to evaluate rates of death from the human prion disease Creutzfeldt-Jakob disease (CJD). The relative risk (RR) of CJD for CWD-endemic county residents was not significantly increased (RR 0.81, 95% confidence interval [CI] 0.40–1.63), and the rate of CJD did not increase over time (5-year RR 0.92, 95% CI 0.73–1.16). In Colorado, human prion disease resulting from CWD exposure is rare or nonexistent. However, given uncertainties about the incubation period, exposure, and clinical presentation, the possibility that the CWD agent might cause human disease cannot be eliminated.
snip... full text ;
http://0-www.cdc.gov.mill1.sjlibrary.org/ncidod/EID/vol12no10/06-0019.htm
full text ;
http://chronic-wasting-disease.blogspot.com/2006_12_01_archive.html
CWD
http://chronic-wasting-disease.blogspot.com/
CJD QUESTIONNAIRE
http://cjdquestionnaire.blogspot.com/
Monitoring the occurrence of emerging forms of CJD
http://cjdusa.blogspot.com/
Singeltary, Sr et al. JAMA.2001; 285: 733-734.
Diagnosis and Reporting of Creutzfeldt-Jakob Disease
Since this article does not have an abstract, we have provided the first 150
words of the full text and any section headings.
To the Editor:
In their Research Letter, Dr Gibbons and colleagues1 reported that the
annual US death rate due to Creutzfeldt-Jakob disease (CJD) has been stable
since 1985. These estimates, however, are based only on reported cases, and
do not include misdiagnosed or preclinical cases. It seems to me that
misdiagnosis alone would drastically change these figures. An unknown number
of persons with a diagnosis of Alzheimer disease in fact may have CJD,
although only a small number of these patients receive the postmortem
examination necessary to make this diagnosis. Furthermore, only a few states
have made CJD reportable. Human and animal transmissible spongiform
encephalopathies should be reportable nationwide and internationally.
Terry S. Singeltary, Sr
Bacliff, Tex
1. Gibbons RV, Holman RC, Belay ED, Schonberger LB. Creutzfeldt-Jakob
disease in the United States: 1979-1998. JAMA. 2000;284:2322-2323. FREE FULL
TEXT
http://jama.ama-assn.org/cgi/content/extract/285/6/733?maxtoshow=&HITS=10&hits=1
JOURNAL OF NEUROLOGY
MARCH 26, 2003
In light of the findings of Asante and Collinge et al, there
should be drastic measures to safeguard the medical and surgical arena
from sporadic CJDs and all human TSEs. I only ponder how many sporadic
CJDs in the USA are type 2 PrPSc?
http://www.neurology.org/cgi/eletters/60/2/176#535
Saturday, January 24, 2009
Research Project: Detection of TSE Agents in Livestock, Wildlife, Agricultural Products, and the Environment Location: 2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/research-project-detection-of-tse.html
Saturday, January 24, 2009 Bovine Spongiform Encephalopathy h-BSE ATYPICAL USA 2008 Annual Report Research Project: Study of Atypical Bse
Location: Virus and Prion Diseases of Livestock
2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/bovine-spongiform-encephalopathy-h-bse.html
Wednesday, January 28, 2009 TAFS1 Position Paper on Specified Risk Materials (January, 2009)
TAFS INTERNATIONAL FORUM FOR TRANSMISSIBLE ANIMAL DISEASES AND FOOD SAFETY a non-profit Swiss Foundation
(January 2009)
TAFS1 Position Paper on Specified Risk Materials
http://madcowspontaneousnot.blogspot.com/2009/01/tafs1-position-paper-on-specified-risk.html
Wednesday, January 28, 2009 TAFS1 Position Paper on BSE in small ruminants (January 2009)
http://scrapie-usa.blogspot.com/2009/01/tafs1-position-paper-on-bse-in-small.html
Monday, September 1, 2008 RE-FOIA OF DECLARATION OF EXTRAORDINARY EMERGENCY BECAUSE OF AN ATYPICAL T.S.E. (PRION DISEASE) OF FOREIGN ORIGIN IN THE UNITED STATES [No. 00-072-1] September 1, 2008
http://foiamadsheepmadrivervalley.blogspot.com/2008/09/re-foia-of-declaration-of-extraordinary.html
-------- Original Message --------
Subject: DOCKET-- 03D-0186 -- FDA Issues Draft Guidance on Use of Material From Deer and Elk in Animal Feed; Availability Date: Fri, 16 May 2003 11:47:37 -0500 From: "Terry S. Singeltary Sr." <mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:flounder@wt.net> To: mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:fdadockets@oc.fda.gov
Greetings FDA,
i would kindly like to comment on; Docket 03D-0186FDA Issues Draft Guidance on Use of Material From Deer and Elk in Animal Feed; Availability Several factors on this apparent voluntary proposal disturbs me greatly, please allow me to point them out;
1. MY first point is the failure of the partial ruminant-to-ruminant feed ban of 8/4/97. this partial and voluntary feed ban of some ruminant materials being fed back to cattle is terribly flawed. without the_total_ and _mandatory_ ban of all ruminant materials being fed back to ruminants including cattle, sheep, goat, deer, elk and mink, chickens, fish (all farmed animals for human/animal consumption), this half ass measure will fail terribly, as in the past decades...
2. WHAT about sub-clinical TSE in deer and elk? with the recent findings of deer fawns being infected with CWD, how many could possibly be sub-clinically infected. until we have a rapid TSE test toassure us that all deer/elk are free of disease (clinical and sub-clinical), we must ban not only documented CWD infected deer/elk, but healthyones as well. it this is not done, they system will fail...
3. WE must ban not only CNS (SRMs specified risk materials), but ALL tissues. recent new and old findings support infectivity in the rump or ass muscle. wether it be low or high, accumulation will play a crucial role in TSEs.
4. THERE are and have been for some time many TSEs in theUSA. TME in mink, Scrapie in Sheep and Goats, and unidentified TSE in USA cattle. all this has been proven, but the TSE in USA cattle has been totally ignored for decades. i will document this data below in my references.
5. UNTIL we ban all ruminant by-products from being fed back to ALL ruminants, until we rapid TSE test (not only deer/elk) but cattle in sufficient numbers to find (1 million rapid TSE test in USA cattle annually for 5 years), any partial measures such as the ones proposed while ignoring sub-clinical TSEs and not rapid TSE testing cattle, not closing down feed mills that continue to violate the FDA's BSE feed regulation (21 CFR 589.2000) and not making freely available those violations, will only continue to spread theseTSE mad cow agents in the USA.
I am curious what we will call a phenotype in a species that is mixed with who knows how many strains of scrapie, who knows what strain or how many strains of TSE in USA cattle, and the CWD in deer and elk (no telling how many strains there), but all of this has been rendered for animal feeds in the USA for decades. it will get interesting once someone starts looking in all species, including humans here in theUSA, but this has yet to happen...
6. IT is paramount that CJD be made reportable in every state (especially ''sporadic'' cjd), and that a CJD Questionnaire must be issued to every family of a victim of TSE. only checking death certificates will not be sufficient. this has been proven as well (see below HISTORY OF CJD -- CJD QUESTIONNAIRE)
7. WE must learn from our past mistakes, not continue to make the same mistakes...
references
snip...
Oral transmission and early lymphoid tropism of chronic wasting diseasePrPres in mule deer fawns (Odocoileus hemionus )
Christina J. Sigurdson1, Elizabeth S. Williams2, Michael W. Miller3,Terry R. Spraker1,4, Katherine I. O'Rourke5 and Edward A. Hoover1Department of Pathology, College of Veterinary Medicine and BiomedicalSciences, Colorado State University, Fort Collins, CO 80523- 1671, USA1Department of Veterinary Sciences, University of Wyoming, 1174 SnowyRange Road, University of Wyoming, Laramie, WY 82070, USA 2Colorado Division of Wildlife, Wildlife Research Center, 317 WestProspect Road, Fort Collins, CO 80526-2097, USA3Colorado State University Veterinary Diagnostic Laboratory, 300 WestDrake Road, Fort Collins, CO 80523-1671, USA4Animal Disease Research Unit, Agricultural Research Service, USDepartment of Agriculture, 337 Bustad Hall, Washington State University,Pullman, WA 99164-7030, USA5Author for correspondence: Edward Hoover.Fax +1 970 491 0523. mhtml:%7B33B38F65-8D2E-434D-8F9B-8BDCD77D3066%7Dmid://00000365/!x-usc:mailto:e-mailehoover@lamar.colostate.eduMule
deer fawns (Odocoileus hemionus) were inoculated orally with abrain homogenate prepared from mule deer with naturally occurring chronic wasting disease (CWD), a prion-induced transmissible spongiform encephalopathy. Fawns were necropsied and examined for PrP res, the abnormal prion protein isoform, at 10, 42, 53, 77, 78 and 80 days post-inoculation (p.i.) using an immunohistochemistry assay modified to enhance sensitivity. PrPres was detected in alimentary-tract-associatedl ymphoid tissues (one or more of the following: retropharyngeal lymphnode, tonsil, Peyer's patch and ileocaecal lymph node) as early as 42days p.i. and in all fawns examined thereafter (53 to 80 days p.i.). No PrPres staining was detected in lymphoid tissue of three control fawns receiving a control brain inoculum, nor was PrPres detectable in neural tissue of any fawn. PrPres-specific staining was markedly enhanced by sequential tissue treatment with formic acid, proteinase K and hydrated autoclaving prior to immunohistochemical staining with monoclonalantibody F89/160.1.5. These results indicate that CWD PrP res can be detected in lymphoid tissues draining the alimentary tract within a few weeks after oral exposure to infectious prions and may reflect the initial pathway of CWD infection in deer. The rapid infection of deer fawns following exposure by the most plausible natural route is consistent with the efficient horizontal transmission of CWD in nature and enables accelerated studies of transmission and pathogenesis in the native species.
snip...
These results indicate that mule deer fawns develop detectable PrPres after oral exposure to an inoculum containing CWD prions. In the earliest post-exposure period, CWD PrPres was traced to the lymphoidtissues draining the oral and intestinal mucosa (i.e. there tropharyngeal lymph nodes, tonsil, ileal Peyer's patches and ileocaecal lymph nodes), which probably received the highest initial exposure to the inoculum. Hadlow et al. (1982) demonstrated scrapie agent in the tonsil, retropharyngeal and mesenteric lymph nodes, ileumand spleen in a 10-month-old naturally infected lamb by mouse bioassay. Eight of nine sheep had infectivity in the retropharyngeal lymph node.He concluded that the tissue distribution suggested primary infection via the gastrointestinal tract. The tissue distribution of PrPres in the early stages of infection in the fawns is strikingly similar to that seen in naturally infected sheep with scrapie. These findings supportoral exposure as a natural route of CWD infection in deer and supportoral inoculation as a reasonable exposure route for experimental studies of CWD.
snip...
http://vir.sgmjournals.org/cgi/content/full/80/10/2757
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now, just what is in that deer feed? _ANIMAL PROTEIN_
Subject: MAD DEER/ELK DISEASE AND POTENTIAL SOURCES
Date: Sat, 25 May 2002 18:41:46 -0700 From: "Terry S. Singeltary Sr." Reply-To: BSE-LTo: BSE-L
8420-20.5% Antler DeveloperFor Deer and Game in the wildGuaranteed Analysis Ingredients / Products Feeding Directions
snip...
_animal protein_
http://www.surefed.com/deer.htm
BODE'S GAME FEED SUPPLEMENT #400A RATION FOR DEERNET WEIGHT 50 POUNDS22.6 KG.
snip...
_animal protein_
http://www.bodefeed.com/prod7.htm
IngredientsGrain Products, Plant Protein Products, Processed Grain By-Products,Forage Products, Roughage Products 15%, Molasses Products,
__Animal Protein Products__,
Monocalcium Phosphate, Dicalcium Pyosphate, Salt,Calcium Carbonate, Vitamin A Acetate with D-activated Animal Sterol(source of Vitamin D3), Vitamin E Supplement, Vitamin B12 Supplement,Riboflavin Supplement, Niacin Supplement, Calcium Panothenate, CholineChloride, Folic Acid, Menadione Soduim Bisulfite Complex, PyridoxineHydorchloride, Thiamine Mononitrate, d-Biotin, Manganous Oxide, ZincOxide, Ferrous Carbonate, Calcium Iodate, Cobalt Carbonate, DriedSacchoromyces Berevisiae Fermentation Solubles, Cellulose gum,Artificial Flavors added.http://www.bodefeed.com/prod6.htm
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MORE ANIMAL PROTEIN PRODUCTS FOR DEER
Bode's #1 Game PelletsA RATION FOR DEERF3153GUARANTEED ANALYSISCrude Protein (Min) 16%Crude Fat (Min) 2.0%Crude Fiber (Max) 19%Calcium (Ca) (Min) 1.25%Calcium (Ca) (Max) 1.75%Phosphorus (P) (Min) 1.0%Salt (Min) .30%Salt (Max) .70%IngredientsGrain Products, Plant Protein Products, Processed Grain By-Products,Forage Products, Roughage Products, 15% Molasses Products,
__Animal Protein Products__,
Monocalcium Phosphate, Dicalcium Phosphate, Salt,Calcium Carbonate, Vitamin A Acetate with D-activated Animal Sterol(source of Vitamin D3) Vitamin E Supplement, Vitamin B12 Supplement,Roboflavin Supplement, Niacin Supplement, Calcium Pantothenate, CholineChloride, Folic Acid, Menadione Sodium Bisulfite Complex, PyridoxineHydrochloride, Thiamine Mononitrate, e - Biotin, Manganous Oxide, ZincOxide, Ferrous Carbonate, Calcium Iodate, Cobalt Carbonate, DriedSaccharyomyces Cerevisiae Fermentation Solubles, Cellulose gum,Artificial Flavors added.FEEDING DIRECTIONSFeed as Creep Feed with Normal Diet
http://www.bodefeed.com/prod8.htm
INGREDIENTS
Grain Products, Roughage Products (not more than 35%), Processed GrainBy-Products, Plant Protein Products, Forage Products,
__Animal Protein Products__,
L-Lysine, Calcium Carbonate, Salt, Monocalcium/DicalciumPhosphate, Yeast Culture, Magnesium Oxide, Cobalt Carbonate, BasicCopper Chloride, Manganese Sulfate, Manganous Oxide, Sodium Selenite,Zinc Sulfate, Zinc Oxide, Sodium Selenite, Potassium Iodide,Ethylenediamine Dihydriodide, Vitamin E Supplement, Vitamin ASupplement, Vitamin D3 Supplement, Mineral Oil, Mold Inhibitor, CalciumLignin Sulfonate, Vitamin B12 Supplement, Menadione Sodium BisulfiteComplex, Calcium Pantothenate, Riboflavin, Niacin, Biotin, Folic Acid,Pyridoxine Hydrochloride, Mineral Oil, Chromium Tripicolinate
DIRECTIONS FOR USE
Deer Builder Pellets is designed to be fed to deer under rangeconditions or deer that require higher levels of protein. Feed to deerduring gestation, fawning, lactation, antler growth and pre-rut, allphases which require a higher level of nutrition. Provide adequateamounts of good quality roughage and fresh water at all times.
http://www.profilenutrition.com/Products/Specialty/deer_builder_pellets.html
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DEPARTMENT OF HEALTH & HUMAN SERVICESPUBLIC HEALTH SERVICEFOOD AND DRUG ADMINISTRATIONApril 9, 2001 WARNING LETTER01-PHI-12CERTIFIED MAILRETURN RECEIPT REQUESTED
Brian J. Raymond, Owner Sandy Lake Mills 26 Mill Street P.O. Box 117 Sandy Lake, PA 16145
PHILADELPHIA DISTRICT
Tel: 215-597-4390
Dear Mr. Raymond:Food and Drug Administration Investigator Gregory E. Beichner conducted an inspection of your animal feed manufacturing operation, located in Sandy Lake, Pennsylvania, on March 23,2001, and determined that your firm manufactures animal feeds including feeds containing prohibited materials. The inspection found significant deviations from the requirements set forth in Title 21, code of Federal Regulations, part 589.2000 - Animal Proteins Prohibited in Ruminant Feed. The regulation is intended to prevent the establishment and amplification of Bovine Spongiform Encephalopathy (BSE) . Such deviations cause products being manufactured at this facility to be misbranded within the meaning of Section 403(f), of the Federal Food, Drug, and Cosmetic Act (the Act).Our investigation found failure to label your swine feed with the required cautionary statement "Do Not Feed to cattleor other Ruminants" The FDA suggests that the statement be distinguished by different type-size or color or other means of highlighting the statement so that it is easily noticed by a purchaser.
In addition, we note that you are using approximately 140 pounds of cracked corn to flush your mixer used in the manufacture of animal feeds containing prohibited material. This flushed material is fed to wild game including deer, a ruminant animal.Feed material which may potentially contain prohibited material should not be fed to ruminant animals which may become part of the food chain.The above is not intended to be an all-inclusive list of deviations fromthe regulations. As a manufacturer of materials intended for animalfeed use, you are responsible for assuring that your overall operation and the products you manufacture and distribute are in compliance withthe law. We have enclosed a copy of FDA's Small Entity Compliance Guideto assist you with complying with the regulation... blah, blah, blah...
http://www.fda.gov/foi/warning_letters/g1115d.pdf
==================================
snip...end...full text ;
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 1 Terry S. Singeltary Sr. Vol #: 1
http://www.fda.gov/ohrms/dockets/dailys/03/Jun03/060903/060903.htm
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 7 Terry S. Singeltary Sr. Vol #: 1
2003D-0186 Guidance for Industry: Use of Material From Deer and Elk In Animal Feed
EMC 7 Terry S. Singeltary Sr. Vol #: 1
http://www.fda.gov/ohrms/dockets/dailys/03/oct03/100203/100203.htm
01N-0423 Substances Prohibited from use in animal food/Feed Ruminant
APE 5 National Renderers Association, Inc. Vol#: 2
APE 6 Animal Protein Producers Industry Vol#: 2
APE 7 Darling International Inc. Vol#: 2
EMC 1 Terry S. Singeltary Sr. Vol#: 3
http://www.fda.gov/ohrms/dockets/dailys/01/Oct01/101501/101501.htm
snip...end
Tuesday, January 06, 2009
CWD Update 93 December 29, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-update-93-december-29-2008.html
Tuesday, January 13, 2009
Antemortem detection of PrPCWD in preclinical, ranch-raised Rocky Mountain elk (Cervus elaphus nelsoni) by biopsy of the rectal mucosa Full Scientific Reports
http://chronic-wasting-disease.blogspot.com/2009/01/antemortem-detection-of-prpcwd-in.html
Saturday, January 10, 2009
Chronic Wasting Disease Investigation Update Michigan December 18, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/chronic-wasting-disease-investigation.html
Sunday, September 07, 2008
CWD LIVE TEST, and the political aspects or fallout of live testing for BSE in cattle in the USA
http://chronic-wasting-disease.blogspot.com/2008/09/cwd-live-test-and-political-aspects-or.html
2008 CWD Laboratory Testing for Wild White-tailed Deer
http://www.michigan.gov/emergingdiseases/0,1607,7-186-25806-202922--,00.html
Wednesday, January 07, 2009
CWD to tighten taxidermy rules Hunters need to understand regulations
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-to-tighten-taxidermy-rules-hunters.html
Monday, January 05, 2009
CWD, GAME FARMS, BAITING, AND POLITICS
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-game-farms-baiting-and-politics.html
Thursday, December 25, 2008 Lions and Prions and Deer Demise
http://chronic-wasting-disease.blogspot.com/2008/12/lions-and-prions-and-deer-demise.html
Tuesday, January 06, 2009
CWD Update 93 December 29, 2008
http://chronic-wasting-disease.blogspot.com/2009/01/cwd-update-93-december-29-2008.html
Tuesday, September 09, 2008 CWD MICHIGAN UPDATE September 5, 2008
http://chronic-wasting-disease.blogspot.com/2008/09/cwd-michigan-update-september-5-2008.html
Monday, August 25, 2008 CWD FIRST DOCUMENTED IN MICHIGAN
http://chronic-wasting-disease.blogspot.com/2008/08/cwd-first-documented-in-michigan.html
Saturday, January 24, 2009
Research Project: Detection of TSE Agents in Livestock, Wildlife, Agricultural Products, and the Environment Location: 2008 Annual Report
http://bse-atypical.blogspot.com/2009/01/research-project-detection-of-tse.html
Wednesday, February 04, 2009 Nebraska reports 22 cases of CWD in deer
http://chronic-wasting-disease.blogspot.com/2009/02/nebraska-reports-22-cases-of-cwd-in.html
TSS
Labels: Antemortem diagnosis • chronic wasting disease • elk • transmissible spongiform encephalopathy, CWD, deer
posted by Terry S. Singeltary Sr. at
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