An IncP plasmid carrying the colistin resistance gene mcr-1 in Klebsiella pneumoniae from hospital sewage [PublishAheadOfPrint]

A Klebsiella pneumoniae strain of ST313 recovered from hospital sewage was found to carry the plasmid-borne colistin resistance gene mcr-1, which was bracketed by two copies of the insertion sequence ISApl1 on a 57-kb self-transmissible IncP type plasmid of a new IncP-1 clade. The carriage of mcr-1 on a self-transmissible broad-host-range plasmid highlights that mcr-1 has the potential to be spread beyond the Enterobacteriaceae.

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