Chronic Wasting Disease in Free-Ranging Wisconsin White-Tailed Deer

Chronic Wasting Disease in Free-Ranging Wisconsin White-Tailed Deer

Damien O. Joly,* Christine A. Ribic,* Julie A. Langenberg,† Kerry Beheler,† Carl A. Batha,† Brian J. Dhuey,‡ Robert E. Rolley,‡ Gerald Bartelt,‡ Timothy R. Van Deelen,§; and Michael D. Samuel*¶
*United States Geological Survey-Wisconsin Cooperative Wildlife Research Unit, University of Wisconsin-Madison, Madison, Wisconsin, USA; †Wisconsin Department of Natural Resources, Madison, Wisconsin, USA; ‡Wisconsin Department of Natural Resources, Monona, Wisconsin, USA; §Wisconsin Department of Natural Resources, Rhinelander, Wisconsin, USA; and ¶United States Geological Survey–National Wildlife Health Center, Madison, Wisconsin, USA

Figure. Spatial distribution of chronic wasting disease in White-tailed Deer sampled in Wisconsin (February–April 2002). Locations for sampled deer were recorded by using the Wisconsin Public Land Survey System (township-range-section); analysis was conducted on pooled 4X4 sections (41 km²), as indicated by the dashed grid lines. Prevalence, 95% confidence limits (CI), and sample size for each quadrat are indicated, as well as sample size only for quadrats in which positive deer were not detected. A cluster of higher than expected prevalence was detected in the north-central region of the sampling area indicated by shading (prevalence 9.4%, 95% CI 5.0% to 16.0%, n=127). The asterisk indicates the quadrat in which the three initial positive deer were found. The circle represents the targeted surveillance area.

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