A Phage-Like IncY Plasmid Carrying the <i>mcr-1</i> Gene in Escherichia coli from a Pig Farm in China

Abstract

We report here a new type of plasmid that carries the <i>mcr-1</i> gene, the pMCR-1-P3 plasmid, harbored in an <i>Escherichia coli</i> strain isolated from a pig farm in China. pMCR-1-P3 belongs to the IncY incompatibility group and is a phage-like plasmid that contains a large portion of phage-related sequences. The backbone of this plasmid is different from that of other <i>mcr-1</i>-carrying plasmids reported previously.