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Dermatophytosis (view source)

Revision as of 20:00, 28 April 2009

107 bytes added , 20:00, 28 April 2009

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→‎Pathogenesis

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==Pathogenesis==

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*Epidermal hyperplasia ([[Skin Glossary - Pathology|hyperkeratosis, parakeratosis, acanthosis]]) and inflammation

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*Epidermal hyperplasia ([[Skin Glossary - Pathology|hyperkeratosis, parakeratosis, acanthosis]]) and [[Inflammation - WikiBlood|inflammation]]

*Superficial perivascular dermatitis -> exocytosis (migration through epidermal layers) -> intracorneal microabscesses

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*Normal -> eruptive nodular -> pseudomycetoma -> onychomycosis

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*Secondary invasion by ''Staphylococcus aureus'' and ''Staphylococcus intermedius'' are common and cause pustules in the hair follicles

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*Secondary invasion by [[Staphylococcus spp.|''Staphylococcus aureus'']] and [[Staphylococcus spp.|''Staphylococcus intermedius'']] are common and cause pustules in the hair follicles

*Grossly:

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**Alopecia due to broken hair shafts and hairs lost from inflammed follicles

**Follicular papules and pustules

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**Peripheral red ring ('''ringworm''') due to dead fungi in areas of inflammation at centre of lesions and viable fungi peripherally

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**Peripheral red ring ('''ringworm''') due to dead fungi in areas of [[Inflammation - WikiBlood|inflammation]]

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at centre of lesions and viable fungi peripherally

*More common in housed animals, rather than animals turned out to pasture

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