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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A hunter harvested the elk next to the lower Ruby Valley, which has a high prevalence of the fatal prion disease in white-tailed and mule deer.
The state has activated its interagency CWD response plan to investigate the detection and increase surveillance of wild deer in the area.
Officials said wildlife biologists euthanized a buck with CWD symptoms at the Flathead County Landfill after receiving reports on the animal.
The case is also only the second such detection in the state after CWD was found in a wild deer in Ballard County in 2023.
The service prioritized jurisdictions that have detected CWD or that border CWD-endemic areas and have either launched surveillance programs or plan to do so.
The test may be useful in CWD surveillance, the authors say.
The dogs were able to identify infected deer through feces samples.
The case raises the number of states with documented chronic wasting disease in deer and other cervids to 35.
The infection in a 2-year-old doe was found during mandatory postmortem CWD surveillance testing.
The 2-year-old white-tailed doe tested positive during required CWD postmortem surveillance.