Media Contact: Steve Lightfoot, TPWD, 512-389-4701,
steve.lightfoot@tpwd.texas.gov Thomas Swafford, TAHC, 512-516-2539,
thomas.swafford@tahc.texas.gov
Feb. 26, 2016
Hartley County Mule Deer Tests Positive for Chronic Wasting Disease
AUSTIN – A free-ranging mule deer buck, harvested in Hartley County, has
been confirmed positive for CWD. State officials received confirmation today
from the National Veterinary Services Laboratory (NVSL) in Ames, Iowa.
Hartley County is located in the Texas Panhandle immediately to the south
of Dalhart and borders New Mexico. The Texas Parks and Wildlife Department
(TPWD) and the Texas Animal Health Commission (TAHC) are contemplating a
multi-tiered risk management response similar to the approach taken in 2012,
when CWD was first discovered in Texas in a free-ranging mule deer in the Hueco
Mountains along the New Mexico border.
The latest discovery marks the eighth mule deer to test positive for CWD in
Texas. The other seven animals, all within the Hueco Mountains area, indicate a
disease prevalence of 10–15 percent within that population.
State officials are currently compiling all the data necessary to finalize
the specific management response for this new CWD positive area, and will engage
stakeholders to ensure that this recent discovery and scenario helps form the
dialogue and recommendations for the future.
CWD was first recognized in 1967 in captive mule deer in Colorado. The
disease has been documented in captive and/or free-ranging deer and elk in 23
states and 2 Canadian provinces. In Texas, CWD has also been documented in six
white-tailed deer in Medina and Lavaca counties.
CWD among cervids is a progressive, fatal disease that commonly results in
altered behavior as a result of microscopic changes made to the brain of
affected animals. An animal may carry the disease for years without outward
indication, but in the latter stages, signs may include listlessness, lowering
of the head, weight loss, repetitive walking in set patterns, and a lack of
responsiveness. To date there is no evidence that CWD poses a risk to humans or
non-cervids. However, as a precaution, the U.S. Centers for Disease Control and
the World Health Organization recommend not to consume meat from infected
animals.
More information on CWD can be found on TPWD’s website, http://tpwd.texas.gov/huntwild/wild/diseases/cwd/
. Or at the Chronic Wasting Disease Alliance website, www.cwd-info.org. More
information about the TAHC CWD program may be found at http://www.tahc.texas.gov/animal_health/cwd/cwd.html.
2016-02-26
Tuesday, February 23, 2016
Parks and Wildlife begins reducing deer population at Texas Mountain Ranch
Chronic Wasting Disease CWD TSE Prion Update
*** I kindly would like to comment on a few statements from the TPWD et al
;
Tuesday, February 23, 2016
ARKANSAS Detects First Chronic Wasting Disease CWD in a wild elk
??? One of the subjects confessed to taking a fourth deer in Texas, which
was wasted and dumped in Arkansas. ???
Wrong State of Mind
A Bowie County game warden received a call from Arkansas Game and Fish
officers in reference to a truck they had stopped that was traveling east on
Interstate 30 from Texas. The vehicle contained 10 whitetail deer, a bobcat and
a turkey breast that had all been harvested in Central Texas. It is illegal to
transport a deer with bones from a chronic wasting disease state into the state
of Arkansas. Since the wildlife officers in Arkansas were not entirely familiar
with Texas laws, they requested the Bowie County warden to inspect the subject’s
game for any Texas violations. The warden inspected the deer at the Arkansas
Game and Fish district office and wrote several citations for tagging
proof-of-sex violations. The state of Arkansas filed several cases for
transporting deer with bone still attached, seized all of the animals and parts
for their violations, and tested the deer for chronic wasting disease.
Don’t Mess With Texas... or Arkansas
A Gregg County game warden responded to a Longview Animal Control call
regarding a decaying doe hanging in a resident’s tree. When the warden located
the deer, he also discovered an additional untagged doe behind the property and
an untagged nine-point buck. Two of the four individuals interviewed claimed
they harvested the two deer in Arkansas. One of the subjects confessed to taking
a fourth deer in Texas, which was wasted and dumped in Arkansas. When questioned
about the discrepancy between their harvest dates versus the date printed on
their Arkansas hunting licenses, two of the subjects acknowledged hunting
without a license. The warden then contacted Arkansas Game and Fish Commission
wildlife officers who advised that they were pursuing more than $2,500 in
charges. They also said that two of the men face one year suspensions, while
another would receive a lifetime hunting license suspension in Arkansas. Civil
restitution and multiple charges were filed, including no hunting license;
hunting during closed season; failure to keep game in edible condition; untagged
deer; and no harvest log. Investigation is ongoing and cases pending.
Wednesday, March 18, 2015
Chronic Wasting Disease CWD Confirmed Texas Trans Pecos March 18,
2015
Wednesday, March 25, 2015
Chronic Wasting Disease CWD Cases Confirmed In New Mexico 2013 and 2014
UPDATE 2015
Thursday, May 02, 2013
*** Chronic Wasting Disease (CWD) Texas Important Update on OBEX ONLY
TEXTING
Monday, February 11, 2013
TEXAS CHRONIC WASTING DISEASE CWD Four New Positives Found in Trans Pecos
Tuesday, July 10, 2012
Chronic Wasting Disease Detected in Far West Texas
Monday, March 26, 2012
Texas Prepares for Chronic Wasting Disease CWD Possibility in Far West
Texas
***for anyone interested, here is some history of CWD along the Texas, New
Mexico border, and my attempt to keep up with it...terry
***CWD TEXAS TAHC OLD FILE HISTORY
updated from some of my old files. ...
Subject: CWD SURVEILLANCE STATISTICS TEXAS (total testing figures less than
50 in two years)
Date: Sun, 25 Aug 2002 21:06:49 –0700
From: "Terry S. Singeltary Sr."
Reply-To: Bovine Spongiform Encephalopathy
To: BSE-L@uni-karlsruhe.de
######## Bovine Spongiform Encephalopathy #########
greetings list members,
here are some figures on CWD testing in TEXAS...TSS
Dear Dr. Singletary,
In Fiscal Year 2001, seven deer from Texas were tested by the National
Veterinary Services Laboratory (NVSL) for CWD (5 fallow deer and 2 white-tailed
deer). In Fiscal Year 2002, seven elk from Texas were tested at NVSL (no deer).
During these two years, an additional six elk and one white-tailed deer were
tested at the Texas Veterinary Medical Diagnostic Laboratory (TVMDL). In Fiscal
Year 2002, four white-tailed deer (free-ranging clinical suspects) and at least
eight other white-tailed deer have been tested at TVMDL. One elk has been tested
at NVSL. All of these animals have been found negative for CWD. Dr. Jerry Cooke
of the Texas Parks and Wildlife Department also has records of 601 clinically
ill white-tailed deer which were necropsied at Texas A&M during the late
1960's and early 1970's, and no spongiform encepalopathies were noted. Thank you
for your consideration.
xxxxxxx
Texas Animal Health Commission
(personal communication...TSS)
Austin 8 news
snip...
"There's about 4 million deer in the state of Texas, and as a resource I
think we need to be doing as much as we can to look for these diseases," said
Doug Humphreys with Texas Parks and Wildlife. "Right now Texas is clear. We
haven't found any, but that doesn't mean we don't look."
With approximately 4 million animals, Texas has the largest population of
white-tailed deer in the nation. In addition, about 19,000 white-tailed deer and
17,000 elk are being held in private facilities. To know if CWD is present in
captive herds, TPWD and Texas Animal Health Commission are working with breeders
to monitor their herds.
How is it spread?
It is not known exactly how CWD is spread. It is believed that the agent
responsible for the disease may be spread both directly (animal to animal
contact) and indirectly (soil or other surface to animal). It is thought that
the most common mode of transmission from an infected animal is via saliva,
feces, and urine.
some surveillance?
beyond the _potential_ methods of transmissions above, why, not a single
word of SRM of various TSE species in feed as a source?
it's a known fact they have been feeding the deer/elk the same stuff as
cows here in USA.
and the oral route has been documented of CWD to mule deer fawns in lab
studies.
not to say that other _potential_ transmission mechanisms are possible, but
why over look the obvious?
TSS
########### http://mailhost.rz.uni-karlsruhe.de/warc/bse-l.html
############
From: Ken Waldrup, DVM, PhD (host25-207.tahc.state.tx.us)
Subject: Re: CWD SAMPLING TEXAS (but NOT in the obvious place, the NM,
TEXAS border)
Date: December 15, 2003 at 3:43 pm PST
In Reply to: CWD SAMPLING TEXAS (but NOT in the obvious place, the NM,
TEXAS border) posted by TSS on December 12, 2003 at 2:15 pm:
Dear sirs:
With regard to your comment about Texas NOT looking for CWD along the New
Mexico border, it is painfully obvious that you do not know or understand the
natural distribution of mule deer out there or the rights of the land owners in
this state. As of 15 December 2003, a total of 42 deer had been sampled from
what we call "Trans-Pecos", beyond the Pecos River. Mule deer are very widely
dispersed through this area, sometimes at densities of one animal per 6 square
miles. The Texas Parks and Wildlife Department does not have the legal authority
to trepass on private property to collect deer. Some landowners are cooperative.
Some are not. Franklin State Park is at the very tip of Texas, and deer from the
park have been tested (all negative). One of the single largest land owners
along the border is the National Park Service. Deer and elk from the Guadalupe
Peak National Park cannot be collected with federal permission. The sampling
throughout the state is based on the deer populations by eco-region and is
dictated by the availability of funds. I am concerned about your insinuation
that CWD is a human health risk. We are at a stand-off - you have no proof that
it is and I have no definitive proof that it isn't. However I would say that the
inferred evidence from Colorado, Wyoming and Wisconsin suggests that CWD is not
a human health concern (i.e. no evidence of an increased incidence of human
brain disorders within the CWD "endemic" areas of these states). From my
professional interactions with the Texas Parks and Wildlife Department, I can
definitely say that they want to do a thorough and sound survey throughout the
state, not willy-nilly "look here, look there". There are limitations of
manpower, finances and, in some places, deer populations. I would congratulate
TPWD for doing the best job with the limitations at hand rather than trying to
browbeat them when you obviously do not understand the ecology of West Texas.
Thank you for your consideration.
======================
From: TSS (216-119-139-126.ipset19.wt.net)
Subject: Re: CWD SAMPLING TEXAS (but NOT in the obvious place, the NM,
TEXAS border)
Date: December 16, 2003 at 11:03 am PST
In Reply to: Re: CWD SAMPLING TEXAS (but NOT in the obvious place, the NM,
TEXAS border) posted by Ken Waldrup, DVM, PhD on December 15, 2003 at 3:43 pm:
HEllo Dr. Waldrup,
thank you for your comments and time to come to this board.
Ken Waldrup, DVM, PhD states;
> it is painfully obvious that you do not know or understand the natural
distribution of mule deer out there or the rights of the land owners in this
state...
TSS states;
I am concerned about all deer/elk not just mule deer, and the rights of
land owners (in the case with human/animal TSEs) well i am not sure of the
correct terminology, but when the States deer/elk/cattle/sheep/humans are at
risk, there should be no rights for land owners in this case. the state should
have the right to test those animals. there are too many folks out there that
are just plain ignorant about this agent. with an agent such as this, you cannot
let landowners (and i am one) dictate human/animal health, especially when you
cannot regulate the movement of such animals...
Ken Waldrup, DVM, PhD states;
> Deer and elk from the Guadalupe Peak National Park cannot be collected
with federal permission.
TSS states;
I do not understand this? so there is no recourse of action even if every
deer/elk was contaminated with CWD in this area (hypothetical)?
Ken Waldrup, DVM, PhD states;
> I am concerned about your insinuation that CWD is a human health risk.
We are at a stand-off - you have no proof that it is and I have no definitive
proof that it isn't. However I would say that the inferred evidence from
Colorado, Wyoming and Wisconsin suggests that CWD is not a human health concern
(i.e. no evidence of an increased incidence of human brain disorders within the
CWD "endemic" areas of these states)...
TSS states;
NEXT, let's have a look at the overall distribution of CWD in Free-Ranging
Cervids and see where the CWD cluster in NM WSMR borders TEXAS;
Current Distribution of Chronic Wasting Disease in Free-Ranging Cervids
NOW, the MAP of the Exoregion where the samples were taken to test for CWD;
CWD SURVEILLANCE SAMPLE SUBMISSIONS TEXAS
Ecoregions of TEXAS
IF you look at the area around the NM WSMR where the CWD cluster was and
where it borders TEXAS, that ecoregion is called Trans Pecos region. Seems if my
Geography and my Ciphering is correct ;-) that region only tested 55% of it's
goal. THE most important area on the MAP and they only test some 96 samples,
this in an area that has found some 7 positive animals? NOW if we look at the
only other border where these deer from NM could cross the border into TEXAS,
this area is called the High Plains ecoregion, and again, we find that the
sampling for CWD was pathetic. HERE we find that only 9% of it's goal of CWD
sampling was met, only 16 samples were tested from some 175 that were suppose to
be sampled.
AS i said before;
> SADLY, they have not tested enough from the total population to
> know if CWD is in Texas or not.
BUT now, I will go one step further and state categorically that they are
not trying to find it. just the opposite it seems, they are waiting for CWD to
find them, as with BSE/TSE in cattle, and it will eventually...
snip...end...TSS
===============================
2005
SEE MAP OF CWD ON THE BORDER OF NEW MEXICO VERY CLOSE TO TEXAS ;
NO update on CWD testing in Texas, New Mexico that i could find. I have
inquired about it though, no reply yet...
-------- Original Message --------
Subject: CWD testing to date TEXAS ?
Date: Mon, 09 May 2005 12:26:20 –0500
From: "Terry S. Singeltary Sr."
To: kristen.everett@tpwd.state.tx.us
Hello Mrs. Everett,
I am most curious about the current status on CWD testing in Texas. could
you please tell me what the current and past testing figures are to date and
what geographical locations these tests have been in. good bust on the illegal
deer trapping case. keep up the good work there.........
thank you, with kindest regards,
Terry S. Singeltary Sr. P.O. Box 42 Bacliff, Texas USA 77518
-------- Original Message --------
Subject: CWD testing in New Mexico
Date: Mon, 09 May 2005 14:39:18 –0500
From: "Terry S. Singeltary Sr."
To: ispa@state.nm.us
Greetings,
I am most curious of the current and past CWD testing in New Mexico, and
there geographical locations...
thank you,
Terry S. Singeltary SR. CJD Watch
#################### https://lists.aegee.org/bse-l.html
####################
2006
----- Original Message -----
From: "Terry S. Singeltary Sr." flounder9@VERIZON.NET
To: BSE-L@aegee.org
Sent: Saturday, December 23, 2006 1:47 PM
Subject: CWD in New Mexico 35 MILES FROM TEXAS BORDER and low testing
sampling figures -- what gives TAHC ???
Subject: CWD in New Mexico 35 MILES FROM TEXAS BORDER and low testing
sampling figures -- what gives TAHC ???
Date: December 23, 2006 at 11:25 am PST
Greetings BSE-L members,
i never know if i am going crazy or just more of the same BSe. several
years ago i brought up the fact to the TAHC that CWD was literally at the Texas
borders and that the sample size for cwd testing was no where near enough in the
location of that zone bordering NM. well, i just wrote them another letter
questioning this again on Dec. 14, 2006 (see below) and showed them two
different pdf maps, one referencing this url, which both worked just fine then.
since then, i have NOT received a letter from them answering my question, and
the url for the map i used as reference is no longer working? i had reference
this map several times from the hunter-kill cwd sampling as of 31 August 2005
pdf which NO longer works now??? but here are those figures for that zone
bordering NM, for those that were questioning the url. the testing samples
elsewhere across Texas where much much more than that figure in the zone
bordering NM where CWD has been documented bordering TEXAS, near the White Sands
Missile Range. SO, why was the Texas hunter-kill cwd sampling as of 31 August
2005 document removed from the internet??? you know, this reminds me of the
infamous TEXAS MAD COW that i documented some 7 or 8 months before USDA et al
documented it, when the TAHC accidentally started ramping up for the
announcement on there web site, then removed it (see history at bottom). i am
not screaming conspiracy here, but confusious is confused again on the ciphering
there using for geographical distribution of cwd tissue sample size survey, IF
they are serious about finding CWD in TEXAS. common sense would tell you if cwd
is 35 miles from the border, you would not run across state and have your larger
samples there, and least samples 35 miles from where is what
found..........daaa..........TSS
THEN NOTICE CWD sample along that border in TEXAS, Three Year Summary of
Hunter-Kill CWD sampling as of 31 August 2005 of only 191 samples, then compare
to the other sample locations ;
TPWD has been conducting surveys of hunter-kill animals since 2002 and has
collected more than 7300 samples (as of 31 August 2005). In total, there have
been over 9400 samples, both hunter-kill and private samples, tested in Texas to
date, and no positives have been found.
SO, out of a total of 9,400 samples taken for CWD surveillance in TEXAS
since 2002 of both hunter-kill and private kill, ONLY 191 samples have been
taken in the most likely place one would find CWD i.e. the border where CWD has
been documented at TEXAS and New Mexico
latest map NM cwd old data
CWD in New Mexico ;
What is the Department doing to prevent the spread of CWD?
Chronic wasting disease (CWD) was recently detected in a mule deer from
Unit 34. Until 2005, CWD had only been found in Unit 19. With this discovery,
the Department will increase its surveillance of deer and elk harvested in Units
29, 30 and 34.
Lymph nodes and/or brain stems from every harvested deer and brain stems
from all elk taken in Unit 34 will be sampled.
snip...
CWD SURVEILLANCE TEXAS
SNIP...SEE FULL TEXT ;
2011 – 2012
Friday, October 28, 2011
CWD Herd Monitoring Program to be Enforced Jan. 2012 TEXAS
Greetings TAHC et al,
A kind greetings from Bacliff, Texas.
In reply to ;
Texas Animal Health Commission (TAHC) Announcement October 27, 2011
I kindly submit the following ;
***for anyone interested, here is some history of CWD along the Texas, New
Mexico border, and my attempt to keep up with it...terry
snip...
see history CWD Texas, New Mexico Border ;
Monday, March 26, 2012
3 CASES OF CWD FOUND NEW MEXICO MULE DEER SEVERAL MILES FROM TEXAS BORDER
Sunday, October 04, 2009
CWD NEW MEXICO SPREADING SOUTH TO TEXAS 2009 2009 Summary of Chronic
Wasting Disease in New Mexico New Mexico Department of Game and Fish
*****2015-2016***
Wednesday, February 10, 2016
*** Wisconsin Two deer that escaped farm had chronic wasting disease CWD
***
Friday, February 05, 2016
*** Report of the Committee on Wildlife Diseases FY2015 CWD TSE PRION
Detections in Farmed Cervids and Wild ***
*** PRION 2015 CONFERENCE FT. COLLINS CWD TSE PRION RISK FACTORS TO HUMANS
***
*** LATE-BREAKING ABSTRACTS PRION 2015 CONFERENCE ***
O18
Zoonotic Potential of CWD Prions
Liuting Qing1, Ignazio Cali1,2, Jue Yuan1, Shenghai Huang3, Diane Kofskey1,
Pierluigi Gambetti1, Wenquan Zou1, Qingzhong Kong1 1Case Western Reserve
University, Cleveland, Ohio, USA, 2Second University of Naples, Naples, Italy,
3Encore Health Resources, Houston, Texas, USA
*** These results indicate that the CWD prion has the potential to infect
human CNS and peripheral lymphoid tissues and that there might be asymptomatic
human carriers of CWD infection.
==================
***These results indicate that the CWD prion has the potential to infect
human CNS and peripheral lymphoid tissues and that there might be asymptomatic
human carriers of CWD infection.***
==================
P.105: RT-QuIC models trans-species prion transmission
Kristen Davenport, Davin Henderson, Candace Mathiason, and Edward Hoover
Prion Research Center; Colorado State University; Fort Collins, CO USA
Conversely, FSE maintained sufficient BSE characteristics to more
efficiently convert bovine rPrP than feline rPrP. Additionally, human rPrP was
competent for conversion by CWD and fCWD.
***This insinuates that, at the level of protein:protein interactions, the
barrier preventing transmission of CWD to humans is less robust than previously
estimated.
================
***This insinuates that, at the level of protein:protein interactions, the
barrier preventing transmission of CWD to humans is less robust than previously
estimated.***
================
*** PRICE OF CWD TSE PRION POKER GOES UP 2014 ***
Transmissible Spongiform Encephalopathy TSE PRION update January 2, 2014
*** chronic wasting disease, there was no absolute barrier to conversion of
the human prion protein.
*** Furthermore, the form of human PrPres produced in this in vitro assay
when seeded with CWD, resembles that found in the most common human prion
disease, namely sCJD of the MM1 subtype.
Envt.07:
Pathological Prion Protein (PrPTSE) in Skeletal Muscles of Farmed and Free
Ranging White-Tailed Deer Infected with Chronic Wasting Disease
***The presence and seeding activity of PrPTSE in skeletal muscle from
CWD-infected cervids suggests prevention of such tissue in the human diet as a
precautionary measure for food safety, pending on further clarification of
whether CWD may be transmissible to humans.
*** These results would seem to suggest that CWD does indeed have zoonotic
potential, at least as judged by the compatibility of CWD prions and their human
PrPC target. Furthermore, extrapolation from this simple in vitro assay suggests
that if zoonotic CWD occurred, it would most likely effect those of the PRNP
codon 129-MM genotype and that the PrPres type would be similar to that found in
the most common subtype of sCJD (MM1).***
*** The potential impact of prion diseases on human health was greatly
magnified by the recognition that interspecies transfer of BSE to humans by beef
ingestion resulted in vCJD. While changes in animal feed constituents and
slaughter practices appear to have curtailed vCJD, there is concern that CWD of
free-ranging deer and elk in the U.S. might also cross the species barrier.
Thus, consuming venison could be a source of human prion disease. Whether BSE
and CWD represent interspecies scrapie transfer or are newly arisen prion
diseases is unknown. Therefore, the possibility of transmission of prion disease
through other food animals cannot be ruled out. There is evidence that vCJD can
be transmitted through blood transfusion. There is likely a pool of unknown size
of asymptomatic individuals infected with vCJD, and there may be asymptomatic
individuals infected with the CWD equivalent. These circumstances represent a
potential threat to blood, blood products, and plasma supplies.
*** The association between venison eating and risk of CJD shows similar
pattern, with regular venison eating associated with a 9 FOLD INCREASE IN RISK
OF CJD (p = 0.04).
see links below, on further down in this posting to the BSE Inquiry and the
CJD study back in 1994...tss
CJD9/10022
October 1994
Mr R.N. Elmhirst Chairman British Deer Farmers Association Holly Lodge
Spencers Lane BerksWell Coventry CV7 7BZ
Dear Mr Elmhirst,
CREUTZFELDT-JAKOB DISEASE (CJD) SURVEILLANCE UNIT REPORT
Thank you for your recent letter concerning the publication of the third
annual report from the CJD Surveillance Unit. I am sorry that you are
dissatisfied with the way in which this report was published.
http://web.archive.org/web/20030511010117/http://www.bseinquiry.gov.uk/files/yb/1994/10/00003001.pdf
O.05: Transmission of prions to primates after extended silent incubation
periods: Implications for BSE and scrapie risk assessment in human populations
Emmanuel Comoy, Jacqueline Mikol, Val erie Durand, Sophie Luccantoni,
Evelyne Correia, Nathalie Lescoutra, Capucine Dehen, and Jean-Philippe Deslys
Atomic Energy Commission; Fontenay-aux-Roses, France
Prion diseases (PD) are the unique neurodegenerative proteinopathies
reputed to be transmissible under field conditions since decades. The
transmission of Bovine Spongiform Encephalopathy (BSE) to humans evidenced that
an animal PD might be zoonotic under appropriate conditions. Contrarily, in the
absence of obvious (epidemiological or experimental) elements supporting a
transmission or genetic predispositions, PD, like the other proteinopathies, are
reputed to occur spontaneously (atpical animal prion strains, sporadic CJD
summing 80% of human prion cases). Non-human primate models provided the first
evidences supporting the transmissibiity of human prion strains and the zoonotic
potential of BSE. Among them, cynomolgus macaques brought major information for
BSE risk assessment for human health (Chen, 2014), according to their
phylogenetic proximity to humans and extended lifetime. We used this model to
assess the zoonotic potential of other animal PD from bovine, ovine and cervid
origins even after very long silent incubation periods. *** We recently observed
the direct transmission of a natural classical scrapie isolate to macaque after
a 10-year silent incubation period, ***with features similar to some reported
for human cases of sporadic CJD, albeit requiring fourfold longe incubation than
BSE. Scrapie, as recently evoked in humanized mice (Cassard, 2014), ***is the
third potentially zoonotic PD (with BSE and L-type BSE), ***thus questioning the
origin of human sporadic cases. We will present an updated panorama of our
different transmission studies and discuss the implications of such extended
incubation periods on risk assessment of animal PD for human health.
===============
***thus questioning the origin of human sporadic cases...TSS
===============
WE HAVE GOT TO CLOSE THIS TSE PRION FEED LOOPHOLE !
P.70: Experimental transmission of chronic wasting disease to sheep and
goats
Gordon Mitchell, Nishandan Yogasingam, Ines Walther, and Aru Balachandran
National and OIE Reference Laboratory for Scrapie and CWD; Canadian Food
Inspection Agency; Ottawa, ON, Canada
The persistence of chronic wasting disease (CWD) in North American cervids,
coupled with efforts to eradicate scrapie in sheep and goats, necessitates an
understanding of the transmission, clinical and diagnostic characteristics of
CWD in small ruminants. Oral and intracerebral transmission studies were
conducted in sheep and goats using tissues from CWD-infected elk. Four lambs and
4 goats were orally inoculated with a pooled brain and lymph node homogenate
from a group of farmed elk with clinical CWD. At study endpoint, there was no
evidence of primary CWD transmission in the sheep or goat tissues examined by
ELISA, western blot and immunohistochemistry (IHC). Two lambs which were
challenged intracerebrally with the same pooled elk inoculate displayed
neurological signs beginning at 27 months postinoculation (mpi) and were
euthanized within 10 d of each other at 28 mpi. Testing of tissues by ELISA and
IHC confirmed disease transmission and revealed differences in the distribution
and intensity of PrPd deposition between animals. Western immunoblot analysis
identified characteristics permitting the differentiation of CWD in sheep from
other prion diseases in small ruminants. CWD-infected tissue from the
intracerabrally-inoculated sheep has undergone secondary passage into sheep and
goats and currently shows no evidence of oral transmission in rectal mucosa
biopsies at 20 mpi. These findings corroborate evidence of a significant species
barrier preventing the oral transmission of CWD to sheep and goats, and identify
diagnostic characteristics to enable the differentiation of prion diseases
affecting small ruminants.
However, prevalence of chronic wasting disease in farmed and free-ranging
cervids continues to climb and as the disease is discovered in an increasing
number of states and provinces,
***the threat of transmission to sheep remains under investigation.
Research Project: TRANSMISSION, DIFFERENTIATION, AND PATHOBIOLOGY OF
TRANSMISSIBLE SPONGIFORM ENCEPHALOPATHIES
Title: Scrapie transmits to white-tailed deer by the oral route and has a
molecular profile similar to chronic wasting disease
Authors
item Greenlee, Justin item Moore, S - item Smith, Jodi - item Kunkle,
Robert item West Greenlee, M -
Submitted to: American College of Veterinary Pathologists Meeting
Publication Type: Abstract Only Publication Acceptance Date: August 12, 2015
Publication Date: N/A
Technical Abstract: The purpose of this work was to determine
susceptibility of white-tailed deer (WTD) to the agent of sheep scrapie and to
compare the resultant PrPSc to that of the original inoculum and chronic wasting
disease (CWD). We inoculated WTD by a natural route of exposure (concurrent oral
and intranasal (IN); n=5) with a US scrapie isolate. All scrapie-inoculated deer
had evidence of PrPSc accumulation. PrPSc was detected in lymphoid tissues at
preclinical time points, and deer necropsied after 28 months post-inoculation
had clinical signs, spongiform encephalopathy, and widespread distribution of
PrPSc in neural and lymphoid tissues. Western blotting (WB) revealed PrPSc with
2 distinct molecular profiles. WB on cerebral cortex had a profile similar to
the original scrapie inoculum, whereas WB of brainstem, cerebellum, or lymph
nodes revealed PrPSc with a higher profile resembling CWD. Homogenates with the
2 distinct profiles from WTD with clinical scrapie were further passaged to mice
expressing cervid prion protein and intranasally to sheep and WTD. In cervidized
mice, the two inocula have distinct incubation times. Sheep inoculated
intranasally with WTD derived scrapie developed disease, but only after
inoculation with the inoculum that had a scrapie-like profile. The WTD study is
ongoing, but deer in both inoculation groups are positive for PrPSc by rectal
mucosal biopsy. In summary, this work demonstrates that WTD are susceptible to
the agent of scrapie, two distinct molecular profiles of PrPSc are present in
the tissues of affected deer, and inoculum of either profile readily passes to
deer.
P.97: Scrapie transmits to white-tailed deer by the oral route and has a
molecular profile similar to chronic wasting disease and distinct from the
scrapie inoculum
Justin Greenlee1, S Jo Moore1, Jodi Smith1, M Heather West Greenlee2, and
Robert Kunkle1 1National Animal Disease Center; Ames, IA USA; 2Iowa State
University; Ames, IA USA
The purpose of this work was to determine susceptibility of white-tailed
deer (WTD) to the agent of sheep scrapie and to compare the resultant PrPSc to
that of the original inoculum and chronic wasting disease (CWD). We inoculated
WTD by a natural route of exposure (concurrent oral and intranasal (IN); n D 5)
with a US scrapie isolate. All scrapie-inoculated deer had evidence of PrPSc
accumulation. PrPSc was detected in lymphoid tissues at preclinical time points,
and deer necropsied after 28 months post-inoculation had clinical signs,
spongiform encephalopathy, and widespread distribution of PrPSc in neural and
lymphoid tissues. Western blotting (WB) revealed PrPSc with 2 distinct molecular
profiles. WB on cerebral cortex had a profile similar to the original scrapie
inoculum, whereas WB of brainstem, cerebellum, or lymph nodes revealed PrPSc
with a higher profile resembling CWD. Homogenates with the 2 distinct profiles
from WTD with clinical scrapie were further passaged to mice expressing cervid
prion protein and intranasally to sheep and WTD. In cervidized mice, the 2
inocula have distinct incubation times. Sheep inoculated intranasally with WTD
derived scrapie developed disease, but only after inoculation with the inoculum
that had a scrapie-like profile. The WTD study is ongoing, but deer in both
inoculation groups are positive for PrPSc by rectal mucosal biopsy. In summary,
this work demonstrates that WTD are susceptible to the agent of scrapie, 2
distinct molecular profiles of PrPSc are present in the tissues of affected
deer, and inoculum of either profile readily passes to deer.
===========================
P.73: Oral challenge of goats with atypical scrapie
Silvia Colussi1, Maria Mazza1, Francesca Martucci1, Simone Peletto1,
Cristiano Corona1, Marina Gallo1, Cristina Bona1, Romolo Nonno2, Michele Di
Bari2, Claudia D’Agostino2, Nicola Martinelli3, Guerino Lombardi3, and Pier
Luigi Acutis1 1Istituto Zooprofilattico Sperimentale del Piemonte; Liguria e
Valle d’Aosta; Turin, Italy; 2Istituto Superiore di Sanit a; Rome, Italy;
3Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna;
Brescia, Italy
Atypical scrapie transmission has been demonstrated in sheep by
intracerebral and oral route (Simmons et al., Andreoletti et al., 2011) but data
about goats are not available yet. In 2006 we orally challenged four goats, five
months old, with genotype R/H and R/R at codon 154. Animals died starting from
24 to 77 months p.i. without clinical signs. They all resulted negative for
scrapie in CNS and peripheral tissues using Western blot and
immunohistochemistry. Nevertheless these goats could still represent carriers.
This hypothesis was investigated through bioassay in tg338 mice, a sensitive
animal model for atypical scrapie infectivity. By end-point dilution titration,
the starting inoculum contained 106.8 ID50/g. In contrast, all tissues from
challenged goats were negative by bioassay. These negative results could be
explained with the low infectivity of the starting inoculum, which could have
been unable to induce Prion 2015 Poster Abstracts S49 disease or infectivity
within our period of observation. However the challenge conditions could have
been a bias too: as the matter of the fact, while the oral challenge of
classical scrapie is still effective in sheep 6–10 months old (Andreoletti et
al., 2011), Simmons et al. (2011) demonstrated a very short efficacy period for
atypical scrapie (24 hours after birth), hypothesizing that natural transmission
could occur mainly via milk. Our work suggests that this could be true also for
goats and it should be taken into account in oral challenges. However a low
susceptibility of goats to atypical scrapie transmission via oral route cannot
be excluded.
atypical Nor-98 Scrapie has been documented from coast to coast in North
America, including the USA. ...terry
Research Project: TRANSMISSION, DIFFERENTIATION, AND PATHOBIOLOGY OF
TRANSMISSIBLE SPONGIFORM ENCEPHALOPATHIES
Title: Transmission of chronic wasting disease to sentinel reindeer
(Rangifer tarandus tarandus)
Submitted to: American College of Veterinary Pathologists Meeting
Publication Type: Abstract Only Publication Acceptance Date: August 12, 2015
Publication Date: N/A
Technical Abstract: Chronic wasting disease (CWD) is a naturally-occurring,
fatal neurodegenerative disease of North American cervids. Reindeer (Rangifer
tarandus tarandus) are susceptible to CWD following oral challenge, but CWD has
not been reported in free-ranging caribou (Rangifer tarandus caribou) or farmed
reindeer. Potential contact between CWD-affected cervids and Rangifer species
that are free-ranging or co-housed on farms presents a potential risk of CWD
transmission. The aims of this study were to 1) investigate the transmission of
CWD from white-tailed deer (Odocoileus virginianus; CWD-wtd), mule deer
(Odocoileus hemionus; CWD-md), or elk (Cervus elaphus nelsoni; CWD-elk) to
reindeer via the intracranial route, and 2) to assess for direct and indirect
horizontal transmission to non-inoculated sentinels. Three groups of 5 reindeer
fawns were challenged intracranially with CWD-wtd, CWD-md, or CWD-elk. Two years
after challenge of inoculated reindeer, non-inoculated control reindeer were
introduced into the same pen as the CWD-wtd inoculated reindeer (n=4) or into a
pen adjacent to the CWD-md inoculated reindeer (n=2). Reindeer were allowed to
develop clinical disease. At death/euthanasia a complete necropsy examination
was performed, including immunohistochemical testing of tissues for
disease-associated CWD prion protein (PrP-CWD). Intracranially challenged
reindeer developed clinical disease from 21 months post-inoculation (MPI).
PrP-CWD was detected in 5/6 sentinel reindeer although only 2/6 developed
clinical disease during the study period (<57 and="" are="" both="" can="" cervid="" cwd="" directly="" div="" from="" have="" indirectly.="" mpi="" naive="" reindeer="" shown="" sources="" susceptible="" that="" to="" transmit="" various="" we="">
Oral transmission and early lymphoid tropism of chronic wasting disease
PrPres 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. Hoover1
snip...
These results indicate that mule deer fawns develop detectable PrP res
after oral exposure to an inoculum containing CWD prions. In the earliest
post-exposure period, CWD PrPres was traced to the lymphoid tissues draining the
oral and intestinal mucosa (i.e. the retropharyngeal 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, ileum and
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 support oral exposure as a natural route of CWD
infection in deer and support oral inoculation as a reasonable exposure route
for experimental studies of CWD.
snip...
A Quarterly Newsletter from the Southeastern Cooperative Wildlife Disease
Study College of Veterinary Medicine The University of Georgia Athens, Georgia
30602
Volume 27 January 2012 Number 4
Red deer susceptibility to CWD via oral inoculation was demonstrated in a
study conducted by collaborators from the U.S. and Canada. Red deer developed
clinical signs and had spongiform changes in the brain when euthanatized at 20
MPI. The CWD prion was detectable in neural and lymphoid tissues, endocrine
organs, cardiac muscle, nasal mucosa, and other tissues. Although field cases of
CWD in red deer have not been reported, results of this study indicate that it
could occur, which is not surprising given that elk and red deer are subspecies
of Cervus elaphus. The results of this study can be found in the Canadian
Veterinary Journal 51: 169-178.
In addition, it was reported in May 2011 that natural cases of CWD were
found in eight Sika deer (Cervus nippon) and five Sika/red deer crossbreeds
during epidemiological investigations of CWD cases in captive elk in Korea.
SECOND, what has MAFF...now DEFRA, what have they said about the mad cow
feed ban in the USA in 2012?
Friday, December 14, 2012
DEFRA U.K. What is the risk of Chronic Wasting Disease CWD being introduced
into Great Britain? A Qualitative Risk Assessment October 2012
snip...
In the USA, under the Food and Drug Administration’s BSE Feed Regulation
(21 CFR 589.2000) most material (exceptions include milk, tallow, and gelatin)
from deer and elk is prohibited for use in feed for ruminant animals. With
regards to feed for non-ruminant animals, under FDA law, CWD positive deer may
not be used for any animal feed or feed ingredients. For elk and deer considered
at high risk for CWD, the FDA recommends that these animals do not enter the
animal feed system. However, this recommendation is guidance and not a
requirement by law.
Animals considered at high risk for CWD include:
1) animals from areas declared to be endemic for CWD and/or to be CWD
eradication zones and
2) deer and elk that at some time during the 60-month period prior to
slaughter were in a captive herd that contained a CWD-positive animal.
Therefore, in the USA, materials from cervids other than CWD positive
animals may be used in animal feed and feed ingredients for non-ruminants.
The amount of animal PAP that is of deer and/or elk origin imported from
the USA to GB can not be determined, however, as it is not specified in TRACES.
It may constitute a small percentage of the 8412 kilos of non-fish origin
processed animal proteins that were imported from US into GB in 2011.
Overall, therefore, it is considered there is a __greater than negligible
risk___ that (nonruminant) animal feed and pet food containing deer and/or elk
protein is imported into GB.
There is uncertainty associated with this estimate given the lack of data
on the amount of deer and/or elk protein possibly being imported in these
products.
snip...
THIRD, THE USDA FDA TRIPLE MAD COW DISEASE FIREWALL, WAS NOTHING MORE THAN
INK ON PAPER !
Saturday, January 31, 2015
European red deer (Cervus elaphus elaphus) are susceptible to Bovine
Spongiform Encephalopathy BSE by Oral Alimentary route
I strenuously once again urge the FDA and its industry constituents, to
make it MANDATORY that all ruminant feed be banned to all ruminants, and this
should include all cervids as soon as possible for the following
reasons...
======
In the USA, under the Food and Drug Administrations BSE Feed Regulation (21
CFR 589.2000) most material (exceptions include milk, tallow, and gelatin) from
deer and elk is prohibited for use in feed for ruminant animals. With regards to
feed for non-ruminant animals, under FDA law, CWD positive deer may not be used
for any animal feed or feed ingredients. For elk and deer considered at high
risk for CWD, the FDA recommends that these animals do not enter the animal feed
system.
***However, this recommendation is guidance and not a requirement by law.
======
31 Jan 2015 at 20:14 GMT
*** Ruminant feed ban for cervids in the United States? ***
31 Jan 2015 at 20:14 GMT
Monday, October 26, 2015
*** FDA PART 589 -- SUBSTANCES PROHIBITED FROM USE IN ANIMAL FOOD OR FEED
VIOLATIONS OFFICIAL ACTION INDICATED OIA UPDATE October 2015 ***
PLEASE LOOK AT THE DRAMATIC DROP IN MAD COW DISEASE OVER DECADE OR MORE IN
THE UK WHEN THE MAD COW FEED BAN FINALLY KICKED IN ;
the History of CWD transmission to CATTLE studies to date ;
Friday, August 14, 2015
*** Susceptibility of cattle to the agent of chronic wasting disease from
elk after intracranial inoculation ***
Tuesday, September 22, 2015
*** Host Determinants of Prion Strain Diversity Independent of Prion
Protein Genotype
Friday, August 28, 2015
*** Chronic Wasting Disease CWD TSE Prion Diagnostics and subclinical
infection ***
Friday, August 14, 2015
*** Carcass Management During a Mass Animal Health Emergency Draft
Programmatic Environmental Impact Statement—August 2015
Saturday, February 6, 2016
*** Secretary's Advisory Committee on Animal Health; Meeting [Docket No.
APHIS-2016-0007] Singeltary Submission ***
kind regards, terry
Terry S. Singeltary Sr.
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