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Flea Allergic Dermatitis (view source)

Revision as of 14:31, 4 August 2010

329 bytes added , 14:31, 4 August 2010

→‎Description

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==Description==

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*Usually involves [[Skin Immunologic - Pathology#Type I

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reactions|Type I reaction]] and [[Skin Immunologic - Pathology#Type IV

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reactions|Type IV reaction]] and cutaneous basophil hypersensitivity

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*Mainly

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dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks,

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neck of cats

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*Secondary trauma is self-inflicted

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*Grossly:

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**Papular

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dermatitis

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**Secondary excoriations

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**Alopecic nodule if

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chronic

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*Microscopically:

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**Hyperplastic superficial

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perivascular dermatitis

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**Oedema, [[Mast Cells|mast cells]],

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[[Basophils|basophils]], [[Eosinophils|eosinophils]],

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[[Lymphocytes|lymphocytes]], histiocytes

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**Fibropruritic nodules

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covered by hyperplastic epidermis

*Occurs in cats and dogs mainly

*Irritation caused by enzymes, anticoagulants and histamine-like substances

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*Mainly dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks, neck of cats

*Secondary trauma is self-inflicted

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*~~Grossly:~~

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*G

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**Papular dermatitis

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**Secondary excoriations

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**Alopecic nodule if chronic

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*Microscopically:

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**Hyperplastic superficial perivascular dermatitis

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**Oedema, [[Mast Cells|mast cells]], [[Basophils|basophils]], [[Eosinophils|eosinophils]], [[Lymphocytes|lymphocytes]], histiocytes

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**Fibropruritic nodules covered by hyperplastic epidermis

==Signalment==

Lizzies

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