Description of a 2,683-Base-Pair Plasmid ContainingqnrDin Two Providencia rettgeri Isolates

Abstract

ABSTRACTqnrgenes are plasmid-mediated quinolone resistance genes mainly harbored on large conjugative multiresistant plasmids. TheqnrDgene was recently observed inSalmonella entericaon a small nonconjugative plasmid (p2007057). We describe two strains ofProvidencia rettgeriharboringqnrDon nonconjugative plasmids. The plasmids were 99% identical, with 2,683 bp and four open reading frames, includingqnrD, but exhibited only 53% identity with the plasmid found inS. enterica.