Figure 1From: In vitro prion protein conversion suggests risk of bighorn sheep (Ovis canadensis) to transmissible spongiform encephalopathiesOverlap of bighorn sheep range with scrapie and chronic wasting disease (CWD). Orange regions represent the present range of bighorn sheep (data from Grand Slam/Ovis). Blue shading indicates either 1–4 (light blue) or 5 or more (dark blue) cases of scrapie in a state or province since October, 2008 (data from US Department of Agriculture and Scrapie Canada). Grey coloring represents areas where CWD has been identified in free-ranging cervid populations. Yellow or red dots indicate CWD in depopulated or active captive facilities, respectively.Back to article page