Chicken Meat as a Reservoir of Colistin-Resistant Escherichia coli Strains Carrying Genes in South America.

The detection and rapid spread of colistin-resistant carrying the gene has created an urgent need to strengthen surveillance. In this study, eight clonally unrelated colistin-resistant isolates carrying and or genes were isolated from commercial chicken meat in Brazil. Most strains carried IncX4 plasmids, previously identified in human and animal isolates.