Chicken meat as a reservoir of colistin-resistant Escherichia coli strains carrying mcr-1 genes in South America

Daniel Farias Monte, Andressa Mem, Miriam R. Fernandes, Louise Cerdeira, Fernanda Esposito, Julia A. Galvão, Bernadette D.G.M. Franco, Nilton Lincopan, Mariza Landgraf

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The detection and rapid spread of colistin-resistant Enterobacteriaceae carrying the mcr-1 gene has created an urgent need to strengthen surveillance. In this study, eight clonally unrelated colistin-resistant Escherichia coli isolates carrying mcr-1 and blaCTX-M or blaCMY-2 genes were isolated from commercial chicken meat in Brazil. Most E. coli strains carried IncX4 plasmids, previously identified in human and animal isolates. These results highlight a new reservoir of mcr-1-harboring E. coli strains in South America.

Original languageEnglish
Article numbere02718
Number of pages4
JournalAntimicrobial Agents and Chemotherapy
Issue number5
Publication statusPublished - May 2017
Externally publishedYes


  • Brazil
  • CTX-M-8
  • ESBL
  • IncX4
  • Mcr-1
  • Polymyxins

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