Comparative Analysis of IncHI2 Plasmids Carrying <i>bla</i> _CTX-M-2 or <i>bla</i> _CTX-M-9 from <i>Escherichia coli</i> and <i>Salmonella enterica</i> Strains Isolated from Poultry and Humans

Abstract

Salmonella enterica bla(CTX-M-2) and bla(CTX-M-9) plasmid backbones from isolates from Belgium and France were analyzed. The bla(CTX-M-2-)plasmids from both human and poultry isolates were related to the IncHI2 pAPEC-O1-R plasmid, previously identified in the United States in avian Escherichia coli strains; the bla(CTX-M-9) plasmids were closely related to the IncHI2 R478 plasmid.