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One isolate was also resistant to beta-lactams, fluoroquinolones, and florfenicol.
The MCR-1 gene was most prevalent in poultry, with 10.7% of turkey isolates and 5.6% of broiler isolates testing positive.
Italian researchers, meanwhile, said they detected a variant of the MCR-1 gene.
Researchers discover a new gene distinct from MCR-1 that can confer colistin resistance and dub it MCR-2.
In Portugal, 11 human samples tested positive, and in Brazil the isolates were from poultry not given polymyxins.
Other reports noted detections in hospital patients, sick chickens, and retail meat samples.
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CIDRAP - Center for Infectious Disease Research and PolicyOffice of the Vice President for Research, University of Minnesota, Minneapolis, MN
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