Direct prion transmission likely predominates during breeding season, but indirect interactions may be more common at socially attractive sites such as scrapes, the authors say.
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The infected bull was transported to Idaho in March 2023 from Alberta, and the Canadian ranch later confirmed a CWD-positive elk.
The affected animals were a mule deer buck harvested north of Columbus and a male white-tailed deer west of Nye.
The affected buck was harvested by a hunter on November 19 in the southeast corner of the reservation, which is located in northeastern Wisconsin.
The buck was harvested during the opening weekend of firearms season in Deer Permit Area 271, along Minnesota's border with South Dakota.
The Tennessee Wildlife Resources Agency reported the case yesterday in a hunter-harvested deer in the county, in the western part of the state.
Wildlife organization calls for culling of herds, increased testing, and a dedicated funding mechanism.
The deer also had epizootic hemorrhagic disease, a fatal viral illness that affects primarily white-tailed deer.
While a road-killed deer or other cervid may be a safety hazard for motorists, CWD experts view it as a potential reservoir of deadly and extremely resilient prions.
After two initial positive tests, the confirmation test was negative, but officials said they are treating the case as CWD.
The white-tailed deer was harvested in the Kootenay region in October near where a CWD-positive doe was killed in a vehicle collision in February 2024.
