Chronic wasting disease cwd
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Chronic Wasting Disease (CWD). By: Fred Lishman . What is Chronic Wasting Disease?. Chronic Wasting Disease (CWD) is a neurological disease found in species of deer, elk and moose. CWD is part of a family of diseases called spongiform encephalopathies or piron disease. (incomplete protein)

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Chronic Wasting Disease (CWD)

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Chronic wasting disease cwd

Chronic Wasting Disease (CWD)

By: Fred Lishman


What is chronic wasting disease

What is Chronic Wasting Disease?

  • Chronic Wasting Disease (CWD) is a neurological disease found in species of deer, elk and moose.

  • CWD is part of a family of diseases called spongiform encephalopathies or piron disease. (incomplete protein)

  • CWD is related to:

    • mad cow disease

    • scrapie in sheep

    • creutzfeldt-Jakob diseasein humans

  • Currently, there is no known relationship that links these diseases.


Cwd history

CWD History

  • CWD was first discovered in 1967 in captive mule deer in Colorado.

  • CWD was identified as a spongiform encephalopathy in 1978.

  • CWD was then discovered in wild mule deer in 1981.


How is cwd spread

How is CWD Spread?

  • CWD can be spread by close contact with infected animals.

    • soil or other surfaces

    • saliva

    • feces

    • decomposing infected carcasses

  • Currently CWD is not known to spread to humans.


Symptoms of cwd

Symptoms of CWD

  • Usually, it could take months to years before the animal shows signs of the disease.

  • Typical symptoms of CWD are:

    • poor body condition

    • change in behavior

    • stumbling

    • excessive drooling

    • widespread stance

    • difficulty swallowing

    • excessive urination, and thirst


How to diagnose cwd

How to Diagnose CWD

  • The brain of the animal is tested to find PrPCWD in various tissues.

  • Areas of focus in the brain are:

    • parasympathetic vagal nucleus (located in dorsal portion of medulla oblongata)

    • obex


Some states where cwd is found

Some States where CWD is Found

  • Colorado

  • Illinois

  • Kansas

  • Maryland

  • Minnesota

  • Missouri

  • Nebraska

  • New Mexico

  • New York

  • North & South Dakota

  • Texas

  • Utah

  • Virginia & west Virginia

  • Wisconsin

  • Wyoming

  • *Pennsylvania (captive deer in Adams county October 2012)


Cwd infected areas

CWD Infected Areas


Cwd and control

CWD and Control

  • There is No treatment or cure for CWD.

  • Try to prevent the spread of CWD in uninfected populations.

  • Quarantine and euthanize animals with the disease.

  • In free-ranging animals, it is harder to control.


Precautious areas

Precautious areas


What precautions should hunters take

What Precautions should Hunters take?

  • The PGC issued an Executive Order prohibiting the importation of certain parts from cervids.

  • Some of these parts include:

    • head

    • spinal cord/ backbone

    • spleen

    • any object that may have brain matter

  • Some things hunters can do to remain safe are:

    • don’t shoot, handle or consume animals that appear sick

    • wear gloves when field dressing

    • bone out the meat

    • minimize handling spinal cord/ brain

    • have your animal tested


What can you do

What can you do?

  • Report any signs of sick animals to your local Game Commission.

  • Do not approach or touch the animal.

  • Do not feed animals.


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