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Volume 9, Number 5—May 2003

Dispatch

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

Damien O. Joly*Comments to Author , 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*¶
Author affiliations: *United States Geological Society-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; ¶United States Geological Society-National Wildlife Health Center, Madison, Wisconsin, USA

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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 quadrant are indicated, as well as sample size only for quadrants in which positive deer were not detected. A c

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 quadrant are indicated, as well as sample size only for quadrants 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 quadrant in which the three initial positive deer were found. The circle represents the targeted surveillance area.

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