Abstract
One hundred and forty-one strains of Enterobacteriaceae (85 strains of Escherichia coli, 20 strains of Klebsiella pneumoniae, 19 strains of Proteus mirabilis, 11 strains of Enterobacter spp., 6 strains of Citrobacter spp.), 31 strains of Pseudomonas aeruginosa, 16 strains of Pseudomonas spp., 9 strains of Acinetobacter baumannii, 12 strains of A. lwoffi, and 11 strains of Pasteurella multocida were isolated from 130 dogs and 33 cats infected with bacteria in one hospital from 2002 to 2010. Twenty strains and 10 strains of multidrug-resistant Enterobacteriaceae (MDRE), which shows resistance to 4 or more classes of antimicrobial agents, were isolated from the dogs and cats, respectively. Thirteen strains, 8 strains, and 5 strains of MDRE were isolated from the urine, skin and subcutaneous abscess, respectively. Although 94% of P. aeruginosa was susceptible to gentamicin, 26% was resistant to ofloxacin. It was considered that attention needed to be paid to a trend of resistance to antimicrobial agents in Gram-negative bacteria.
