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Dermatographism in a horse.
1Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station 77840.
The Cornell Veterinarian
|January 1, 1989
Summary
This study presents a case of dermatographic urticaria in a horse, characterized by skin reactions to touch. The condition resolved spontaneously without a determined cause, highlighting diagnostic challenges.
Area of Science:
- Veterinary Dermatology
- Equine Medicine
- Immunology
Background:
- Dermatographic urticaria, a skin hypersensitivity, presents diagnostic challenges in equine cases.
- This condition involves wheal formation upon mechanical stimulation of the skin.
Observation:
- An eight-year-old Thoroughbred gelding exhibited forelimb edema and generalized urticaria.
- Clinical signs included urticarial reactions to mechanical pressure, indicative of dermatographism.
- Hematologic, serum biochemical, immunologic, and histologic evaluations revealed no specific abnormalities.
Findings:
- The equine case of dermatographic urticaria resolved spontaneously within five weeks.
- Etiology of the condition remained undetermined despite comprehensive evaluation.
- Therapeutic responses to corticosteroids and H1 antihistamines were equivocal.
Implications:
- This case underscores the diagnostic complexities of dermatographic urticaria in horses.
- Further research into equine dermatographism pathogenesis and treatment is warranted.
- Understanding human dermatographic urticaria provides comparative insights for veterinary cases.