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Chronic Wasting Disease (CWD) is a contagious neurological disease that has been found in deer, elk and moose – collectively called cervids.
According to the Michigan Department of Natural Resources (MDNR), CWD can be transmitted through direct animal-to-animal contact or contact with saliva, urine, feces, blood, and/or certain carcass parts such as brain tissue and spinal cord of an infected animal. It is caused by prions and can remain in the environment for more than 10 years.
Prions infected with CWD cause small lesions in the brains of infected animals resulting in death. Infected deer may show no signs of disease or illness for several years. Advanced signs of CWD infection include:
- Emaciation
- Abnormal behavior including loss of fear of humans
- Loss of bodily functions
Read more in the MDNR Chronic Wasting Disease Frequently Asked Questions PDF.
Deer hunting & processing
Hunters play an important role in limiting the spread of chronic wasting disease. The MDNR has several ways to have deer checked and tested for CWD. See a map of deer check stations in Michigan.
There have been no known transfer of CWD to humans at this point. Based on CDC recommendations, MSU Extension recommends not consuming venison from CWD positive animals.
Michigan CWD cases
Since discovered in Michigan in 2015, Michigan State University AgBioResearch scientists and the Michigan Department of Natural Resources have been working on a plan to identify areas of the state that are at high risk for CWD based on deer behavior and population dynamics. The plan depends on a model that combines deer population density, proximity to bordering states where CWD has been confirmed and disease transmission to predict where CWD will likely emerge and spread.
See more chronic wasting disease resources from the Michigan Department of Natural Resources.
News
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Tips for disposing deer carcasses and parts to minimize spreading chronic wasting disease
Published on November 13, 2020
Properly disposing of deer carcasses will help slow the spread of chronic wasting disease. -
Putting high quality venison on the table
Published on November 13, 2020
When preparing for deer hunting, remember food safety in addition to hunter safety. -
Hunters: Look for signs of illness in deer
Published on September 23, 2020
Identifying deer with chronic wasting disease is not always possible by visual observation. There are common signs that may indicate a deer is sick, but it may or may not have chronic wasting disease.
