Escherichia coli harboring mcr-1 in a cluster of liver transplant recipients: detection through active surveillance and whole genome sequencing

: mcr-1, a plasmid-associated gene for colistin resistance, was first described in China in 2015, but its spread in the United States is unknown. We report detection of mcr-1-carrying Escherichia coli ST117 in a cluster of three liver transplant recipients.