Low level of polymyxin resistance among nonclonal mcr-1-positive Escherichia coli from human sources in Brazil.

Diagn Microbiol Infect Dis

Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Instituto Nacional de Pesquisa em Resistência Antimicrobiana-INPRA, Brazil.

Published: February 2019

We report 26 human isolates of mcr-1-positive Escherichia coli, most of them (65.4%) with a polymyxin B MIC of 2 mg/L. Seventeen out of the 24 mcr-1-positive E. coli proved to be nonclonal by rep-PCR which strengthens the hypothesis of environmental or animal origin of these strains and reinforces the one health context of antimicrobial resistance.

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http://dx.doi.org/10.1016/j.diagmicrobio.2018.08.009DOI Listing

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