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Skin Immunologic - Pathology (view source)

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

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===Flea ~~bite hypersensitivity~~===

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===[[Flea Bite 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]] and cutaneous basophil hypersensitivity

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

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*Secondary trauma is self-inflicted

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*Grossly:

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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

==Autoimmune reactions==

Bara

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