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    Chronic Wasting Disease News

    Chronic Wasting Disease (CWD) is a slow but progressive, fatal disease of the nervous system in free-ranged mule-deer and farmed white-tail deer known to affect the deer (cervid) family: white-tailed deer, mule deer (elk), and moose. It is transmitted animal-to-animal via shedding of the infectious agent in the feces and saliva. Deer with CWD will show signs of the disease for several weeks or months before they die and are usually within the 3-4 year age group.

    fallow-deer-984576-1920.jpgCWD was first reported in Colorado in 1967 and has since been discovered in 23 other states as well as internationally in South Korea and regions of Canada. 2017 is the 50th year anniversary of the first discovery of CWD.

    Chronic Wasting Disease is caused not by a bacterium such as Lyme Disease, or a virus, but by a deformed protein called Prion. (Until recently though, prion diseases were known to affect livestock and humans, but not wildlife animals.) Some plants and land areas carry prion proteins; and it's thought by researchers that if we eliminate landscapes with these deformed proteins, then maybe we can eliminate Chronic Wasting Disease.

    The disease belongs in the family of diseases called transmissible spongiform encephalopathies (TSE) and only harms this family of wild animals - or so research displayed until recently in 2017. As far as we know, it is not transmittable to herd members outside of the cervid family.

    The problem arises.

    In 2002, CWD was found 40 miles from the Maryland border in Pennsylvania. Because of this finding, and others along the way, researchers believe that the outbreak of CWD in the Northeast region came from West Virginia and Maryland and has since been in high alert in southern Fulton and Bedford counties in Pennsylvania. Although the problem isn't as severe in Pennsylvania as in it's neighboring states, Pennsylvania landowners have been warned of the threat and are advised to keep this wildlife species at bay.

    Research in Wisconsin believes that agriculture landscapes may have something to do with the spread of Chronic Wasting Disease; and where the deer population live may spread twice as fast in some landscape settings.

    "CWD seems to be moving in association with some of our landscape features," says Katherine Richgels, applied wildlife health research branch chief for the National Wildlife Health Center. "It's more likely to move through denser forests, and it seems to be blocked to some degree by the river corridor, moving fast along the one side but not crossing it."

    Chronic Wasting Disease has been found in 40 of Wisconsin's 72 counties since 2002.

    The problem grows

    What was once thought as a problem only for the deer family has raised alarm for humans. Canada's Health Products and Food Branch issued out a 2017 advisory stating that humans may be infected with CWD if they ingest venison that has ties with CWD. Although the report was written for Canadian farmers and landowners, the report does address the concern for homeowners and farmers within the United States.

    “There is the potential for Canadians to be exposed to cervids through farming (including veterinary services), slaughter, velvet harvest, as well as through field dressing of hunted animals, preparing trophies and/or the use of cervid-derived materials (e.g., urine) as hunting lures,” states the advisory.

    Individuals who have eaten venison infected with CWD have experienced anxiety, tremors and ataxia.

    Deer Symptoms of Chronic Wasting Disease

    Deer farmers and deer breeders should watch herds of deer and test them for CWD. Be on the look-out for the following symptoms:

    • depression;
    • difficulty swallowing;
    • excess salivation;
    • increased thirst;
    • lack of coordination;
    • paralysis;
    • pneumonia;
    • separation from the other animals in the herd;
    • unusual behavior;
    • excessive urination; and
    • weight loss

    CWD sampling and registration should be performed for deer that are suspected of having the disease. If the disease is present on the farm, it's possible that the deer farm may be quarantined in the interim until it is declared safe for business. The [possibly] infected deer may need to be taken away or set aside in a deer fence for observation. Contact your local game and wildlife commission with any questions.

    Information taken from Deerbusters.com.

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