Co-occurrence of colistin-resistance genes mcr-1 and mcr-3 among multidrug-resistant Escherichia coli isolated from cattle, Spain, September 2015

Colistin resistance genesmcr-3 andmcr-1 have been detected in anEscherichia coli isolate from cattle faeces in a Spanish slaughterhouse in 2015. The sequences of both genes hybridised to same plasmid band of ca?250 kb, although colistin resistance was non-mobilisable. The isolate was producing extended-spectrum beta-lactamases and belonged to serotype O9:H10 and sequence type ST533. Here we report anmcr-3 gene detected in Europe following earlier reports from Asia and the United States.
Source: Eurosurveillance - Category: Infectious Diseases Source Type: research