2012 Volume 21 Issue 4 Pages 170-179
Minimum growth inhibitory concentrations of antibacterial agents were determined using a broth-microdilution method, and antibacterial activity of each drug was assessed in clinical isolates from dogs and cats which had been brought to our animal hospital in Yamaguchi City in 2011. Twenty percent of strains of the Staphylococcus intermedius group (SIG), 10 percent of strains of coagulase negative Staphylococci, and 33 percent of strains of S. aureus were methicillin-resistant (MR). Although MR Staphylococci were resistant to many antimicrobial drugs, MRSIG were sensitive to minocycline, arbekacin, linezolid, vancomysin, and teicoplanim. Enterococcus spp., especially E. faecium, were resistant to many drugs. Twenty-four percent of strains of Escherichia coli and 17 percent of strains of Klebsiella pneumoniae were productive of extended - spectrum β-lactamase. Twenty-four percent of strains of E. coli and 6 percent of strains of Pseudomonas aeruginosa were resistant to fluoroquinolone. Since various kinds of resistant bacteria were isolated from dogs and cats in this survey, attention needs to be paid to the trend toward resistance to antibacterial agents.
