Difference between revisions of "Flea Allergic Dermatitis"
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==Description== | ==Description== | ||
| + | *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 | ||
| + | *Grossly: | ||
| + | **Papular | ||
| + | dermatitis | ||
| + | **Secondary excoriations | ||
| + | **Alopecic nodule if | ||
| + | chronic | ||
| + | *Microscopically: | ||
| + | **Hyperplastic superficial | ||
| + | perivascular dermatitis | ||
| + | **Oedema, [[Mast Cells|mast cells]], | ||
| + | [[Basophils|basophils]], [[Eosinophils|eosinophils]], | ||
| + | [[Lymphocytes|lymphocytes]], histiocytes | ||
| + | **Fibropruritic nodules | ||
| + | covered by hyperplastic epidermis | ||
*Occurs in cats and dogs mainly | *Occurs in cats and dogs mainly | ||
*Irritation caused by enzymes, anticoagulants and histamine-like substances | *Irritation caused by enzymes, anticoagulants and histamine-like substances | ||
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*Mainly dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks, neck of cats | *Mainly dorsolumbosacral area involved, abdomen, caudomedial thighs, flanks, neck of cats | ||
*Secondary trauma is self-inflicted | *Secondary trauma is self-inflicted | ||
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==Signalment== | ==Signalment== | ||
Revision as of 14:31, 4 August 2010
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This article is still under construction. |
| Also known as: | FAD, Flea Bite Hypersensitivity, FBH, Flea Dermatosis |
Description
- 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
- 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
- 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
- G