Plasmid-mediated quinolone resistance determinants qnr and aac(6')-Ib-cr in extended-spectrum -lactamase-producing Escherichia coli and Klebsiella pneumoniae in China

Abstract

qnr and aac(6')-Ib-cr genes were detected in 8.0% and 9.9% of ESBL-producing E. coli and K. pneumoniae, respectively. The plasmids carrying the qnr gene could be transferred by conjugation together with ESBL-encoding genes and aac(6')-Ib-cr.