| Line 29: |
Line 29: |
| | | | |
| | | | |
| − | ====Dermatophilosis==== | + | ====[[Dermatophilosis]]==== |
| − | [[Image: Dermatophilosis in cow.jpg|100px|thumb|right|<small><center>Dermatophilosis in a cow (Courtesy of Bristol BioMed Image Archive)</center></small>]]
| |
| | | | |
| − | *Caused by [[Dermatophilus congolensis|''Dermatophilus congolensis'']]
| |
| − | *Affects cattle, horses, sheep mainly
| |
| − | *More common in wet and warm weather
| |
| − | *Transmotted from animal to animal
| |
| − | *Lesions tend to form on dorsal back and extremities
| |
| − | *Associated with skin trauma, prolonged wetting or [[Parasitic skin infections - Pathology#Parasitic| parasites]]
| |
| − | ** -> penetration of zoospores
| |
| − | *Bacteria proliferate in outer sheath of hair follicles and superficial epidermis
| |
| − | *Gram-positive, filamentous branching organisms, subdivided longitudinally and transversly
| |
| − | *Causing:
| |
| − | **Acute inflammatory response -> neutrophil migration through dermis and epidermis -> formation of microabscesses
| |
| − | **Further penetration of bacteria is thus prevented
| |
| − | **Regenerated epidermis is invaded again by remaining organisms
| |
| − | **Repeated reinfection -> multilaminated pustular crusts
| |
| − | *Grossly:
| |
| − | **[[Skin Glossary - Pathology|Papules, pustules, crusts]] may coalesce and mat the coat
| |
| − | *Microscopically:
| |
| − | **Hyperplastic superficial perivascular dermatitis
| |
| − | **Multilaminated crusts, alternating keratin and inflammatory cell layers
| |
| | | | |
| | ====[[Greasy pig disease]]==== | | ====[[Greasy pig disease]]==== |