Antimicrobial susceptibility of Staphylococcus intermedius isolated from healthy and diseased dogs

A total of 90 strains of Staphylococcus intermedius isolated from dogs were examined for antimicrobial susceptibility. There were no significant diffe rences in the distribution patterns of MICs between strains from 1982 to 19 85 and those from 1999, and between strains from healthy dogs and those fro m diseased dogs. All of the strains were susceptible to ABPC, DMPPC, CEX, T DM, ERFX, BFLX, and FF at concentrations of 0.05 to 6.25 mug/ml. The MICs o f OTC, KM, EM, AIV-TS, and LCM were distributed in a broad range of 0.1 to >100 mug/ml, indicating the existence of resistant as well as susceptible p opulations of S. intermedius. Thirty-three strains (36.7%) were resistant t o one or more anitmicrobial agents such as OTC (n=32), KM (n=9), EM (n=7), AIV-TS (n=7), and LCM (n=7).