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− | ====Dermatophilosis==== | + | ====[[Dermatophilosis]]==== |
− | [[Image: Dermatophilosis in cow.jpg|100px|thumb|right|<small><center>Dermatophilosis in a cow (Courtesy of Bristol BioMed Image Archive)</center></small>]]
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− | *Caused by [[Dermatophilus congolensis|''Dermatophilus congolensis'']]
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− | *Affects cattle, horses, sheep mainly
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− | *More common in wet and warm weather
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− | *Transmotted from animal to animal
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− | *Lesions tend to form on dorsal back and extremities
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− | *Associated with skin trauma, prolonged wetting or [[Parasitic skin infections - Pathology#Parasitic| parasites]]
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− | ** -> penetration of zoospores
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− | *Bacteria proliferate in outer sheath of hair follicles and superficial epidermis
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− | *Gram-positive, filamentous branching organisms, subdivided longitudinally and transversly
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− | *Causing:
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− | **Acute inflammatory response -> neutrophil migration through dermis and epidermis -> formation of microabscesses
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− | **Further penetration of bacteria is thus prevented
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− | **Regenerated epidermis is invaded again by remaining organisms
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− | **Repeated reinfection -> multilaminated pustular crusts
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− | *Grossly:
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− | **[[Skin Glossary - Pathology|Papules, pustules, crusts]] may coalesce and mat the coat
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− | *Microscopically:
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− | **Hyperplastic superficial perivascular dermatitis
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− | **Multilaminated crusts, alternating keratin and inflammatory cell layers
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| ====[[Greasy pig disease]]==== | | ====[[Greasy pig disease]]==== |