Sweat Hypersensitivity-Induced Urticaria and Sebaceous Adenitis in an American Saddlebred

    September 2013 in “ Journal of Veterinary Internal Medicine ”
    Gwendolen Lorch, M. B. Calderwood Mays, Holly Roberts, K.K. Isler
    TLDR Sweat hypersensitivity can cause severe skin issues in horses.
    A 5-year-old American Saddlebred gelding exhibited chronic dermatitis and pruritic urticaria induced by sweating, unresponsive to treatments. Diagnostic tests confirmed sebaceous adenitis and sweat hypersensitivity, with intradermal tests showing sweat as an antigen. Despite initiating a desensitization protocol, the horse was euthanized due to poor hair coat maintenance. This case was significant as it was the first reported instance of sweat hypersensitivity-induced urticaria and sebaceous adenitis in a horse, conditions previously documented in humans. The study suggested considering sweat hypersensitivity-induced urticaria in horses with similar symptoms.
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