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Parasitic skin infections - Pathology (view source)

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===[[Trombiculidiasis]]===

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==~~Protozoa==~~

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==[[Protozoal Dermatosis]]==

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*Cutaneous infection may become a part of systemic infection

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*Mostly caused by [[~~Protozoa|''Leishmania''~~]]

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*Transmitted by [[Insecta|sandflies]]

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*Occurs in dogs, cats and rodents (also humans)

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*Grossly in dog:

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**Generalised alopecia

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**Silvery white scales

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**Nodules and ulcers if more severe

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**Mainly on muzzle, ears and eyes where flies feed

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*Microscopically:

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**[[Skin Glossary - Pathology|Hyperkeratosis, parakeratosis, crusts]]

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**Granulomatous nodules in dermis

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**Macrophages, some lymphocytes and plasma cells - periadnexal pattern, may affect sebaceous glands

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**Organisms may be found extra or intracellularly

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