What are the visual signs of chronic wasting disease?
Chronic wasting disease (CWD) has an extended incubation period averaging 18–24 months between infection and the onset of noticeable signs. During this time frame animals look and act normal. The most obvious sign of CWD is progressive weight loss. Numerous behavioral changes also have been reported, including decreased social interaction, loss of awareness, and loss of fear of humans. Diseased animals also may exhibit increased drinking, urination, and excessive salivation.
All CWD symptoms can have other causes and could lead to misdiagnosis of the condition if the animal is not specifically tested for CWD.
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Chronic Wasting Disease
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New Approach May Detect Chronic Wasting Disease Earlier, at Less Cost
A new statistical approach to disease surveillance may improve scientists’ and managers’ ability to detect chronic wasting disease earlier in white-tailed deer by targeting higher-risk animals. This approach can also provide financial and personnel savings for agencies that are required to monitor for wildlife diseases, including the National Park Service, or NPS.
Chronic Wasting Disease in White-Tailed Deer
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Environmental Persistence of Chronic Wasting Disease Exacerbates Deer Population Declines
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Lichens May Aid in Combating Deadly Chronic Wasting Disease in Wildlife
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Distribution of Chronic Wasting Disease in North America
Distribution of Chronic Wasting Disease in North America, updated August 2, 2019.
White-tailed Deer
A male white-tailed deer. By USDA photo by Scott Bauer - Image Number: K5437-3.http://www.ars.usda.gov/is/graphics/photos/may01/k5437-3.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=245466
A bull elk with chronic wasting disease
A bull elk with chronic wasting disease at Wind Cave National Park. The emaciated appearance and drooping ears are characteristic of latter stages of infection.
Deer with Chronic Wasting Disease
This deer shows visible signs of chronic wasting disease.