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Skin Immunologic - Pathology (view source)

Revision as of 10:20, 30 June 2010

616 bytes removed , 10:20, 30 June 2010

→‎Culicoides hypersensitivity

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**Perivascular inflammation may be involved especially in horses

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===~~Culicoides hypersensitivity===~~

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===[[Culicoides Hypersensitivity]]===

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*Usually involves [[Skin Immunologic - Pathology#Type I reactions|Type I reaction]] and [[~~Skin Immunologic - Pathology#Type IV reactions|Type IV reaction]] due to salivary antigens of ''~~Culicoides~~'' sp.~~

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*May be seasonally recurring or continuous depending on climate

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*Grossly:

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**Papules, crusts, alopecia, excoriations, lichenification

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*Microscopically:

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**Superficial and dep perivascular dermatitis

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**Many eosinophils

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**Epidermal hyperplasia

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**Hyperkeratosis

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**Dermal fibrosis

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**Possibly eosinophilic folliculitis, intraepidermal pustules and [[Skin Other - Pathology#Eosinophilic granuloma|eosinophilic granulomas]]

===[[Flea Bite Hypersensitivity]]===

Bara

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