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FibromasThese are proliferative growths caused by infection with papilloma- or poxviruses, largely spread by biting insects. fibromas tend to be darkly pigmented and relatively hairless, and because they are restricted to the skin, have no impact on meat quality.
AbscessesSparring is part of the normal behavioral ecology of deer, and with it penetrating wounds which can lead to abscesses. an abscess is a fluid-filled pocket containing purulent material, or pus. pus contains spent white-blood cells, which the immune system mobilizes to fight off infection. abscesses often form following injury to the muscle, but occasionally bucks will sustain wounds to the head leading to brain abscesses. as a general rule of thumb, ruminants are great at walling off infections, so trimming away affected tissue can preserve meat quality.
Foot rot/club footAs in domestic ruminants, this disease process is often caused by bacterial invasion with fusobacterium sp. following a penetrating injury to the interdigital space. infection causes pain and lameness, and in extreme cases, persistent swelling can lead to a club-like appearance of the hoof or lower limb even after infection has resolved. environmental conditions and contamination of shared paths can facilitate local outbreaks.
Hemorrhagic DiseaseThis describes disease caused by two closely related orbiviruses: Bluetongue (BT) and Epizootic Hemorrhagic Disease (EHD). Though deer can contract BT, it is primarily a disease of small ruminants and cattle. In contrast, deer are the primary hosts of EHD. This disease is spread by female culicoides midges, often called “no-see-ums,” that consume a blood-meal from an infected deer and then transmit the virus to new hosts with each bite. Infected deer experience an incubation period of 7-10 days, during which they remain asymptomatic, followed by the rapid onset of clinical signs and death within 8-36 hours. Deer will often be found in or near bodies of water to cool themselves during end-stage disease. Occasionally, deer in Iowa will survive acute disease and suffer from chronic injuries to the hoof wall (laminitis), causing deer to tip-toe or even walk on their “knees” and brisket.
Chronic Wasting Disease
Chronic Wasting Disease (CWD) can affect wild and captive cervids (deer, elk, moose, and caribou) in iowa and is transmitted by a misfolded prion protein shed in saliva, nasal secretions, and other excreta. prions are normal host proteins found throughout the body, however exposure to the infectious form can force a conformational shift that causes prions to aggregate in the brain. prion diseases are uniformly fatal and pose a grave risk to long-term herd health in populations afflicted by this disease. Learn how you can help stop the spread of Chronic Wasting Disease (CWD).