Plasmid with Colistin Resistance Gene mcr-1 in Extended-Spectrum-β-Lactamase-Producing Escherichia coli Strains Isolated from Pig Slurry in Estonia

Antimicrob Agents Chemother. 2016 Oct 21;60(11):6933-6936. doi: 10.1128/AAC.00443-16. Print 2016 Nov.

Abstract

A plasmid carrying the colistin resistance gene mcr-1 was isolated from a pig slurry sample in Estonia. The gene was present on a 33,311-bp plasmid of the IncX4 group. mcr-1 is the only antibiotic resistance gene on the plasmid, with the other genes mainly coding for proteins involved in conjugative DNA transfer (taxA, taxB, taxC, trbM, and the pilX operon). The plasmid pESTMCR was present in three phylogenetically very different Escherichia coli strains, suggesting that it has high potential for horizontal transfer.

MeSH terms

  • Animals
  • Anti-Bacterial Agents / pharmacology
  • Colistin / pharmacology*
  • Drug Resistance, Bacterial / drug effects
  • Drug Resistance, Bacterial / genetics*
  • Escherichia coli / drug effects*
  • Escherichia coli / genetics*
  • Escherichia coli / isolation & purification
  • Escherichia coli Proteins / genetics*
  • Estonia
  • Farms
  • Female
  • Manure / microbiology
  • Microbial Sensitivity Tests
  • Plasmids / genetics
  • Swine / microbiology
  • beta-Lactamases / genetics*

Substances

  • Anti-Bacterial Agents
  • Escherichia coli Proteins
  • MCR-1 protein, E coli
  • Manure
  • beta-Lactamases
  • Colistin