Increasing Trends in Prevalence among Extended-Spectrum-β-Lactamase-Producing Escherichia coli Isolates from French Calves despite Decreasing Exposure to Colistin

Marisa Haenni (1) , Véronique Métayer (1) , Emilie Gay (2) , Jean-Yves Madec (1)

1 AVB - Unité Antibiorésistance et Virulence Bactériennes
2 EAS - Unité Epidémiologie et Appui à la Surveillance

S ince the first description of the plasmid-mediated colistin resistance gene (mcr-1), over 30 follow-up reports have proved the worldwide geographical distribution of this gene (1, 2). The overall picture indicates a very low prevalence in animals, human beings, and retail food, with two exceptions, the first in China, where mcr-1 carriage was observed in 21% and 15% of the animals and raw meat samples, and the second in France, where 21% of the extended-spectrum-␤-lactamase (ESBL)-producing Escherichia coli isolates from calves were mcr-1 positive (1, 3).

Domaines: Bactériologie

Marisa Haenni, Véronique Métayer, Emilie Gay, Jean-Yves Madec. Increasing Trends in Prevalence among Extended-Spectrum-β-Lactamase-Producing Escherichia coli Isolates from French Calves despite Decreasing Exposure to Colistin. Antimicrobial Agents and Chemotherapy, 2016, 60 (10), pp.6433-6434. ⟨10.1128/AAC.01147-16⟩. ⟨anses-04018219⟩