A prion sickness similar to mad cow is spreading rapidly through North America’s deer and elk populations. A veterinary microbiologist discusses the options for keeping it in check.
This article was originally featured on Knowable Magazine. Alethal, incurable malady similar to mad cow disease is sweeping across deer species in North America and starting to spread around the world. First identified in a single herd of captive mule deer in Colorado in 1967, chronic wasting disease—CWD—has now been found in captive and wild mule deer, white-tailed deer, elk, moose and reindeer.
The infectious CWD prion is a very good key for that one really common lock, but with different alleles, the lock is subtly different, and the key doesn’t work as well. We’re still learning exactly how it all interacts, though. Over time, we started to focus on two different “good” alleles. I think our end goal is to use artificial insemination and other breeding practices until we have a population of animals with just the good alleles, eliminating the one we know is terrible.
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