title: Species distribution and antimicrobial susceptibility of staphylococci isolated from canine otitis externa.
abstract: The diversity of species of the genus Staphylococcus sp. and the antimicrobial resistance of isolates from 151 unmedicated dogs of both sexes with a clinical diagnosis of otitis were recorded. Ninety-one isolates of Staphylococcus spp. were identified by biochemical reactions and tested for susceptibility to 15 antimicrobials. Coagulase-positive species were most common; S. pseudintermedius (38.4%), S. schleiferi schleiferi (15.4%), S. aureus (14.3%), S. epidermidis (11%), S. simulans (11%), S. schleiferi coagulans (8.8%) and S. saprophyticus (1.1%). All the isolates showed resistance to at least one drug and 89% were multiresistant. Amoxicillin combined with clavulanic acid and oxacillin were the most effective, while resistance was widely observed for neomycin and erythromycin. The results highlight the recognition and the potential need for bacterial culture with species identification and antimicrobial susceptibility tests for appropriate antimicrobial therapy.
authors.affiliation: Laboratório de Bacteriologia Veterinária, Instituto Biomédico, Universidade Federal Fluminense, Niterói, RJ, Brazil.
authors.forename: Bruno
authors.initials: B
authors.lastname: Penna
authors.forename: Renato
authors.initials: R
authors.lastname: Varges
authors.forename: Luciana
authors.initials: L
authors.lastname: Medeiros
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Martins
authors.forename: Rodrigo R
authors.initials: RR
authors.lastname: Martins
authors.forename: Walter
authors.initials: W
authors.lastname: Lilenbaum
mesh_terms: D000658:Amoxicillin / Q000008:administration & dosage / Q000627:therapeutic use; D000818:Animals; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D019818:Clavulanic Acid / Q000008:administration & dosage / Q000627:therapeutic use; D004283:Dog Diseases / Q000188:drug therapy / Q000382:microbiology*; D004285:Dogs; D024881:Drug Resistance, Bacterial; D004359:Drug Therapy, Combination / Q000662:veterinary; D004917:Erythromycin / Q000627:therapeutic use; D005260:Female; D008297:Male; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D009355:Neomycin / Q000627:therapeutic use; D010032:Otitis Externa / Q000188:drug therapy / Q000382:microbiology / Q000662:veterinary*; D010068:Oxacillin / Q000008:administration & dosage / Q000627:therapeutic use; D013207:Staphylococcal Skin Infections / Q000188:drug therapy / Q000382:microbiology / Q000662:veterinary*; D013210:Staphylococcus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D019818:Clavulanic Acid; D004917:Erythromycin; D000658:Amoxicillin; D009355:Neomycin; D010068:Oxacillin