Difference between revisions of "Cutaneous Habronemiasis"
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==Treatment== | ==Treatment== | ||
| − | + | Systemic glucocorticoids decrease the inflammatory response of the the hypersensitivity reaction, oral prednisolone is effective at a dose of 1mg/kg SID or BID for 14days and then tapered. | |
| + | Organophosphate pastes and anti-inflammatory pastes can be applied to the wound until it has healed, or thye wound should be bandaged to prevent reinfestation. | ||
| + | Excessive granulation tissue should be removed surgically. | ||
| + | Ivermectin or appropriate anthelmintics should be used to limit nematode infestation, fly control will also reduce exposure to the larvae. | ||
==Prognosis== | ==Prognosis== | ||
Revision as of 12:20, 25 July 2010
- Grossly:
- Single or multiple tomorous masses that proliferate and ulcerate
- Red to brown, on section have small gritty yellow to white foci
- Microscopically:
- Nodular dermatitis
- Eosinophils, epithelioid macrophages, multinucleated giant cells
- Larvae and necrotic tissue
- Granulation tissue with neutrophils along ulcerated surface
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This article is still under construction. |
Description
Cutaneous Habronemiasis is a hypersensitivity reaction to the larvae of the nematode species Habronema and Draschia. The Larvae are deposited by the housefly and stableflyhouse flies or stable flies on the skin when they feed.
Signalment
The condition occurs most commonly in warm wet climates such as the tropics and sub tropics but is also a common skin condition in the UK. It affects moist regions of the body and open wounds and has a seasonal occurance whihc partially or fully resolves over the winter.
Diagnosis
Clinical signs
Single or multiple nodular lesions Excessive granulation tissue Pruritus lesions most commonly occur on the legs, ventral abdomen, around the eyes, urethral process and prepuce and at the site of pre-existing wounds.
Biopsy
Pathology
Treatment
Systemic glucocorticoids decrease the inflammatory response of the the hypersensitivity reaction, oral prednisolone is effective at a dose of 1mg/kg SID or BID for 14days and then tapered. Organophosphate pastes and anti-inflammatory pastes can be applied to the wound until it has healed, or thye wound should be bandaged to prevent reinfestation. Excessive granulation tissue should be removed surgically. Ivermectin or appropriate anthelmintics should be used to limit nematode infestation, fly control will also reduce exposure to the larvae.
Prognosis
Recurrence is common. Fly control, meticulus wound management and regular anthelmintic use is needed to prevent or limit the condition.
References
- Knottenbelt, D.C. A Handbook of Equine Medicine for Final Year Students University of Liverpool
- Rose, R. J. and Hodgson, D. R. (2000) Manual of Equine Practice (Second Edition) Sauders.
| Also known as: | Summer sores Granular dermatitis Bursautee |