Prevalence of mcr-1 in commensal Escherichia coli from French livestock, 2007 to 2014

Agnès Perrin-Guyomard (1) , Mireille Bruneau (1) , Pamela Houée (1) , Karine Deleurme (1) , Patricia Legrandois (1) , Catherine Poirier (1) , Christophe Soumet (1) , Pascal Sanders (1)

1 Laboratoire de Fougères - ANSES

Colistin resistance was investigated in 1,696 isolates collected from 2007 to 2014 within the frame of the French livestock antimicrobial resistance surveillance programme. The mcr-1 gene was detected in all com-mensal Escherichia coli isolates with a minimum inhibi-tory concentration to colistin above the 2 mg/L cutoff value (n=23). In poultry, mcr-1 prevalence was 5.9% in turkeys and 1.8% in broilers in 2014. In pigs, investigated in 2013, this prevalence did not exceed 0.5%. These findings support that mcr-1 has spread in French livestock. We report mcr-1 prevalence data in commensal Escherichia coli isolated from French livestock from 2007 to 2014.

Keywords: Livestock; Bacteria; Colistin; Antimicrobial resistance

Keywords: Escherichia coli; Animal; Colistine; Antibiorésistance

Domains: Animal biology; Microbiology and Parasitology

Agnès Perrin-Guyomard, Mireille Bruneau, Pamela Houée, Karine Deleurme, Patricia Legrandois, et al.. Prevalence of mcr-1 in commensal Escherichia coli from French livestock, 2007 to 2014. Eurosurveillance, 2016, 21 (6), pp.1-3. ⟨10.2807/1560-7917.ES.2016.21.6.30135⟩. ⟨anses-01347790⟩