Difference between revisions of "Flea Allergic Dermatitis"

Revision as of 14:32, 4 August 2010

Also known as:

FAD, Flea Bite Hypersensitivity, FBH, Flea Dermatosis

dorsolumbosacral area involved, abdomen, caudomedial  thighs, flanks,

neck of cats

dermatitis

chronic

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

perivascular dermatitis

covered by hyperplastic epidermis

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 ==Description==
-*Occurs in cats and dogs mainly
-*Irritation caused by enzymes, anticoagulants and histamine-like substances
-*[[Flea Bite Hypersensitivity|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 [[Skin Immunologic - Pathology#Type I  reactions|Type I reaction]] and [[Skin Immunologic - Pathology#Type IV  reactions|Type IV reaction]] and cutaneous basophil hypersensitivity
-*Mainly  dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks,  neck of cats
-*Secondary trauma is self-inflicted
-*G
 ==Signalment==