qnr, aac(6′)-Ib-cr and qepA genes in Escherichia coli and Klebsiella spp.: genetic environments and plasmid and chromosomal location

Abstract

The aac(6')-Ib-cr gene was detected for the first time in the chromosome, although a plasmidic location was the most frequently found, with differentiation of plasmids types in E. coli versus Klebsiella.