any infection caused by an imperfect fungus of the form-class Hyphomycetes; the group has been divided into hyalohyphomycosis and phaeohyphomycosis based on the color of the mycelium and wall of the fungus.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A disease of horses and mules, dogs, cattle, and cats (rarely of humans) caused by the fungus Pythium insidiosum (Hyphomyces destruens); most common in tropic or subtropic environmens, characterized by granulomatous and necrotic lesions that appear on the head and lower legs, ulcerate, and enlarge by subcutaneous extension. Also causes gastrointestinal tract granulomas, particularly in dogs. Rarely, ophthalmic, nasopharyngeal, or disseminated forms occur in animals. Risk of infection increases with exposure to swampy, warm environments.
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