Detection of mcr -mediated colistin resistance in Escherichia coli isolated from pigs in small-scale farms in Cambodia.

Colistin is today considered a last-line antimicrobial for the treatment of infections in humans caused by multidrug-resistant Enterobacteriaceae [1]. The dissemination of colistin resistance has received increased attention since a mobilized gene conferring resistance to colistin, mcr-1 , was described in Enterobacteriaceae from humans and food-producing animals in China in 2015 [2], and additional gene homologs have since been identified [3-15].