An adult female North American bison (Bison bison) with a chronic otitis externa/media of the right ear was examined because of a 4-mo history of intermittent anorexia, apparent painful behavior, and auricular discharge from the right ear. Computerized tomography (CT) demonstrated osteolysis of the tympanic, petrous, and squamous aspects of the temporal bone with soft tissue replacement and sclerosis of the right bulla. A total ear canal ablation with bulla curettage was performed, and cefazolin-impregnated polymethacrylate beads were left within the right bulla and the remnant temporal bone. Six months after the surgery, the bison had no clinical signs of otitis media.
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1 September 2001
CHRONIC OTITIS EXTERNA/MEDIA WITH TOTAL EAR CANAL ABLATION AND BULLA CURETTAGE IN A NORTH AMERICAN BISON (BISON BISON)
Shannon T. Ferrell,
Celia Valverde,
Lyndsay G. Phillips
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Journal of Zoo and Wildlife Medicine
Vol. 32 • No. 3
September 2001
Vol. 32 • No. 3
September 2001
Bison bison
bulla curettage
ear canal ablation
North American bison
otitis externa
OTITIS MEDIA