Cutaneous pythiosis in beef calves.
Six Brahman and Brahman-cross calves less than or equal to 9 months old were examined because of ulcerative swellings of the fetlocks (5 calves) or numerous focal ulcerated cutaneous lesions (1 calf). Biopsies revealed focal cutaneous granulomas around regular, thick-walled branching hyphae, 4 to 9 micron in diameter. In all cases, portions of the hyphae were surrounded by granular encrustations, which ultrastructurally were composed of amorphous material comparable to antigen-antibody complexes. The protist Pythium sp was isolated from 2 calves.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology*; D003881:Dermatomycoses / Q000473:pathology / Q000662:veterinary*; D006099:Granuloma / Q000473:pathology / Q000662:veterinary; D008297:Male; D011775:Pythium; D012867:Skin / Q000473:pathology