Clonal transmission of a colistin-resistant #Escherichia coli# from a domesticated pig to a human in Laos

Sir,Colistin, recently reintroduced in human medicine, is one ofthe most important antibiotics currently used to treat severeGram-negative bacterial infections in humans. Unfortunately, it isalso extensively used in animal production, including in swineandpoultryfarmingagainstGram-negativebacterialpathogens.