High Prevalence of Plasmid-Mediated Quinolone Resistance Genes <i>qnr</i> and <i>aac(6′)-Ib-cr</i> in Clinical Isolates of <i>Enterobacteriaceae</i> from Nine Teaching Hospitals in China

Abstract excerpt

Quinolone resistance is an emerging problem in China. To investigate the prevalence of the plasmid-mediated quinolone resistance genes qnr and aac(6')-Ib-cr, a total of 265 clinical isolates of Escherichia coli, Klebsiella pneumoniae, Citrobacter freundii, and Enterobacter cloacae with ciprofloxacin MICs of > or =0.25 microg/ml were screened at nine teaching hospitals in China. The qnrA, qnrB, qnrS, and...

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