title: Chronic otitis externa/media with total ear canal ablation and bulla curettage in a North American bison (Bison bison).
abstract: 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.
authors.affiliation: Companion Avian & Exotic Pet Medicine Service, Veterinary Medical Teaching Hospital, University of California, One Shields Avenue, Davis, California 95616, USA.
authors.forename: S T
authors.initials: ST
authors.lastname: Ferrell
authors.forename: C
authors.initials: C
authors.lastname: Valverde
authors.forename: L G
authors.initials: LG
authors.lastname: Phillips
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage; D016164:Bison; D002437:Cefazolin / Q000008:administration & dosage; D002908:Chronic Disease; D003475:Curettage / Q000662:veterinary; D004424:Ear Canal / Q000473:pathology / Q000601:surgery*; D004432:Ear, Middle / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D008863:Microspheres; D010032:Otitis Externa / Q000000981:diagnostic imaging / Q000601:surgery / Q000662:veterinary*; D010035:Otitis Media, Suppurative / Q000000981:diagnostic imaging / Q000601:surgery / Q000662:veterinary*; D013396:Suction / Q000662:veterinary; D013701:Temporal Bone / Q000000981:diagnostic imaging / Q000473:pathology; D007507:Therapeutic Irrigation / Q000662:veterinary; D014057:Tomography, X-Ray Computed / Q000662:veterinary
chemical_list: D000900:Anti-Bacterial Agents; D002437:Cefazolin