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Genetic and Functional Characterization of an MCR-3-Like Enzyme-Producing Escherichia coli Isolate Recovered from Swine in Brazil

Kieffer, Nicolas ; Nordmann, Patrice ; Moreno, Andrea Micke ; Zanolli Moreno, Luisa ; Chaby, Richard ; Breton, Aude ; Tissières, Pierre ; Poirel, Laurent

In: Antimicrobial Agents and Chemotherapy, 2018, vol. 62, no. 7, p. e00278-18

A collection of 126 pigs was screened for carriage of colistin-resistant Enterobacteriaceae in a farm in Minas Gerais, Brazil. Out of this collection, eight colistin-resistant Escherichia coli isolates were recovered, including one from Minas Gerais State producing a new MCR-3 variant (MCR-3.12). Analysis of the lipopolysaccharide revealed that MCR-3.12 had a function similar to that of MCR-1...