Difference between revisions of "Flea Allergic Dermatitis"
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m (moved Flea Dermatosis to Flea Allergic Dermatitis: More commonly used nomenclature) |
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| − | |'''Flea | + | |'''FAD, Flea Bite Hypersensitivity, FBH, Flea Dermatosis''' |
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Revision as of 14:27, 4 August 2010
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This article is still under construction. |
| Also known as: | FAD, Flea Bite Hypersensitivity, FBH, Flea Dermatosis |
Description
- Occurs in cats and dogs mainly
- Irritation caused by enzymes, anticoagulants and histamine-like substances
- Hypersensitivity to flea saliva may develop
- Young or small animals may suffer from aneamia
- Lesions normally in dorsolumbosacral region, caudomedial thighs, ventral abdomen, flank, neck (cats)
- Grossly:
- Red papules and secondary excoriations
- Usually involves Type I reaction and Type IV reaction and cutaneous basophil hypersensitivity
- Mainly dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks, neck of cats
- Secondary trauma is self-inflicted
- Grossly:
- Papular dermatitis
- Secondary excoriations
- Alopecic nodule if chronic
- Microscopically:
- Hyperplastic superficial perivascular dermatitis
- Oedema, mast cells, basophils, eosinophils, lymphocytes, histiocytes
- Fibropruritic nodules covered by hyperplastic epidermis