American Society for Microbiology, Antimicrobial Agents and Chemotherapy, 5(49), p. 2137-2139, 2005
DOI: 10.1128/aac.49.5.2137-2139.2005
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ABSTRACT We compared the susceptibility of 312 extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae isolates with that of 1,216 ESBL nonproducers. Of ESBL producers, 25% were susceptible to gentamicin, 30% to trimethoprim-sulfamethoxazole, 41% to ciprofloxacin, and 60% to piperacillin-tazobactam. ESBL nonproducers were more often susceptible to these agents. ESBL-producing Enterobacteriaceae represent a major source of resistance to various antibiotics.