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 commensal Escherichia coli isolates with a minimum inhibitory concentration to colistin above the 2 mg/L cut-off 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.

Prevalence Of Mcr-1 In Commensal Escherichia Coli From French Livestock, 2007 To 2014

Eurosurveillance, Volume 21, Issue 6, 11 February 2016

A Perrin-Guyomard, M Bruneau, P Houée, K Deleurme, P Legrandois, C Poirier, C Soumet, P Sanders

http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=21380