Complete nucleotide sequence of a conjugative IncF plasmid from an Escherichia coli isolate of equine origin containing blaCMY-2 within a novel genetic context.

Abstract

A blaCMY-2 -containing conjugative IncF plasmid denoted as pEQ011, previously identified in a multidrug-resistant Escherichia coli isolate of equine origin, was characterized. The plasmid consisted of 85 507 bp, with 118 predicted open reading frames. This is the first known report demonstrating the association of a blaCMY-2 gene with an IncF incompatibility-type plasmid backbone. A novel genetic arrangement was identified wherein the blaCMY-2 resistance gene was proximally flanked by IS1294 along with a partial blc gene located distally and within a yacABC operon.