Saturday, October 02, 2010

Utilizing disease surveillance to examine gene flow and dispersal in white-tailed deer

Utilizing disease surveillance to examine gene flow and dispersal in white-tailed deer

Amy C. Kelly1,*, Nohra E. Mateus-Pinilla1,2, Marlis Douglas2, Michael Douglas2, William Brown3, Marilyn O. Ruiz3, John Killefer1, Paul Shelton4, Tom Beissel4, Jan Novakofski1Article first published online: 14 SEP 2010

DOI: 10.1111/j.1365-2664.2010.01868.x

© 2010 The Authors. Journal compilation © 2010 British Ecological Society

Kelly, A. C., Mateus-Pinilla, N. E., Douglas, M., Douglas, M., Brown, W., Ruiz, M. O., Killefer, J., Shelton, P., Beissel, T. and Novakofski, J. , Utilizing disease surveillance to examine gene flow and dispersal in white-tailed deer. Journal of Applied Ecology, no. doi: 10.1111/j.1365-2664.2010.01868.x

Author Information

1 Department of Animal Sciences, University of Illinois, 1503 S. Maryland Dr., Urbana, IL 61801, USA

2 Illinois Natural History Survey, Institute of Natural Resource Sustainability, University of Illinois, 1816 S. Oak St., Champaign, IL 61820, USA

3 Department of Pathobiology, College of Veterinary Medicine, University of Illinois, 2001 S Lincoln, Urbana, IL 61801, USA

4 Division of Wildlife Resources, Illinois Department of Natural Resources, One Natural Resources Way, Springfield, IL 62702, USA

*Correspondence: Amy C. Kelly,

*Correspondence: Correspondence author. E-mail:

Publication History Article first published online: 14 SEP 2010 Received 18 January 2010; accepted 4 August 2010 Handling Editor: Mark Hebblewhite

Keywords: genetic structure; isolation by distance; microsatellite; prion; sex-biased dispersal; spatial autocorrelation


1. The prevention and management of transmissible diseases hinges upon understanding host dispersal because it influences distribution of wildlife, affects the rate of disease transmission, and alters the spatial distribution of infection. The relationship between host dispersal and chronic wasting disease (CWD) in cervids is of interest because potential interspecies transmission of fatal prion diseases creates serious risks for wildlife, domestic species, and humans.

2. We used molecular techniques to examine dispersal in a population of Illinois white-tailed deer Odocoileus virginianus. Sampled individuals inhabited areas with confirmed cases of CWD, a transmissible prion disease of cervids, with additional sampling in uninfected locations. We genotyped 1410 deer harvested through CWD surveillance using 10 microsatellites and measured gene flow, determined population structure and quantified gender-specific differences in dispersal. Additionally we used spatial autocorrelation and parentage assignments to examine individual movements.

3. Female deer demonstrated philopatry as evidenced by higher levels of genetic structure, positive spatial autocorrelation and maternity assignments within one home range.

4. Male deer were less genetically structured and frequently exchanged genes across >100 km.

5. Synthesis and applications. Dispersal contributes to the spread of wildlife diseases. Therefore, knowledge of wildlife movement patterns can enhance the efficacy of disease control programmes. Our findings show that samples collected for disease surveillance are useful for measuring gene flow and inferring dispersal in white-tailed deer. High genetic admixture indicates males disperse regardless of landscape features. In contrast, distinct clustering of females demonstrates localized dispersal and philopatry. Taken together, results suggest that CWD surveillance and culling of males should be broadly expanded after an outbreak. Furthermore, surveillance of hunter-harvested deer can be used to identify locales in which CWD occurs, and this information should be used to focus culling efforts on females within genetically defined clusters (‘matriarchal groups’). Removal of matriarchal groups at those locations will reduce horizontal transmission more than widely distributed population reductions.

Wednesday, September 08, 2010


Wednesday, September 08, 2010

Emerging Infectious Diseases: CJD, BSE, SCRAPIE, CWD, PRION, TSE Evaluation to Implementation for Transfusion and Transplantation September 2010

Friday, September 24, 2010 BSE

Surveillance Continues to Benefit Canadian Cattle Producers September 24, 2010 - Notice to Industry


Terry S. Singeltary Sr.
P.O. Box 42
Bacliff, Texas USA 77518



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