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Gangrenous Dermatitis

Source: www.ag.auburn.edu
Topic: Dermatitis
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Sort Desciption: Gangrenous dermatitis is a G disease that primarily affects birds 4 to 8 weeks of age. Although mortality can be rapid with no apparent indication of a problem, affected birds often exhibit depression, lack of coordination, and anorexia. ...

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Gangrenous dermatitis is a G disease that primarily affects birds 4 to 8 weeks of age. Although mortality can be rapid with no apparent indication of a problem, affected birds often exhibit depression, lack of coordination, and anorexia. If present, skin lesions start as small pimple-like lesions that spread rapidly becoming large open or discolored areas covering the skin. These lesions are often accompanied by large amounts of blood-tinged gelatinous fluid that weeps from the wounds. Affected birds may also exhibit skin swelling that when rubbed emits an odd crackling sound, due to the presence of bacterially-produced gas under the skin. previously Gangrenous dermatitis is caused by several bacteria, including members of the group Clostridia as well as Staphylococcus aureus. Escherichia coli (E.coli) are also frequently isolated from gangrenous dermatitis lesions, although their role in the disease has not yet been determined. Mortality rates differ, but are highest in birds infected with clostridia. Birds infected with Staphylococcus aureus tend to exhibit a more chronic problem associated with lower mortality. Prevention of gangrenous dermatitis is made difficult by the fact that exposure is universal, since the responsible bacteria are commonly found throughout the environment Soil, feces, dust, contaminated feed, water, and equipment have all served as sources of infection. Exposure becomes problematic with the simultaneous presence of viruses such as infectious bursal disease virus or chick anemia virus which diminish the immune response to bacterially contaminated skin wounds and scratches. Recent attention has focused on litter or soil treatments for the prevention of gangrenous dermatitis. Many testimonials have touted the advantages of using products as widely varied as salt, alum, and sodium sulfate. In reality, little reliable information is available on the effectiveness of most of these products. Caution ...

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