Chronic Wasting Disease

By: 23 News
By: 23 News

As hunting season draws near, the Illinois Department of Natural Resources cautions hunters about Chronic Wasting Disease.

The disease is found in deer and elk, and it's similar to mad cow disease. The disease attacks the brain of infected animals causing them to act abnormally, lose coordination and eventually die. Humans have not known Chronic Wasting Disease and there is no scientific evidence that eating venison can transmit it. The CDC says hunter should still take precautions.

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Chronic Wasting Disease

  • To date, chronic wasting disease has been found only in members of the deer family in North America. Animals include: Rocky Mountain Elk, mule deer, white-tailed deer, and black-tailed deer.

  • There is ongoing research to explore the possibility of transmission of chronic wasting disease to other species.

Clinical Signs

  • Most cases of chronic wasting disease occur in adult animals.

  • The disease is progressive and always fatal.

  • The most obvious and consistent clinical sign of chronic wasting disease is weight loss over time.

  • Behavioral changes also occur in the majority of cases, including decreased interactions with other animals.

What Causes chronic wasting disease?

  • The agent responsible for chronic wasting disease has not been completely characterized.

  • There are three main theories on the nature of the agent that causes chronic wasting disease:
    • The agent is a prion, an abnormal form of a normal protein, known as cellular prion protein, most commonly found in the central nervous system.

    • The agent is an unconventional virus.

    • The agent is a virino, or "incomplete" virus composed of nucleic acid protected by host proteins. The chronic wasting disease agent is smaller than most viral particles and does not evoke any detectable immune response or inflammatory reaction in the host animal.

Source: U.S. Department of Agriculture contributed to this report.


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