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Euro Surveill. 2016 Apr 28;21(17). doi: 10.2807/1560-7917.ES.2016.21.17.30214.

Silent dissemination of colistin-resistant Escherichia coli in South America could contribute to the global spread of the mcr-1 gene.

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Department of Clinical Analysis, School of Pharmacy, Universidade de São Paulo, São Paulo, Brazil.

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During a Brazilian multicentric antimicrobial resistance surveillance study, colistin resistance was investigated in 4,620 Enterobacteriaceae isolated from human, animal, food and environmental samples collected from 2000 to 2016. We present evidence that mcr-1-positive Escherichia coli has been emerging in South America since at least 2012, supporting a previous report on the possible acquisition of mcr-1-harbouring E. coli by European travellers visiting Latin American countries.


Brazil; ESBL; Enterobacteriaceae; MCR-1; South America; colistin resistance

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