Chronic wasting disease, a prion protein disease that is fatal in elk, deer, and other cervids, has spread rapidly across the United States since it was first identified in 1967. CWD has now reached Idaho near the Oregon border, causing concern for the Columbian white-tailed deer, a rare subspecies found only in two regions in Oregon.

The deer have little genetic protection against CWD, but a new study from the University of Illinois Urbana-Champaign shows that about half of Oregon elk carry a gene that makes them less susceptible to the disease. That could help slow down CWD's progress into the state, but it is still important to monitor and manage cervid populations.