<i>mcr-1</i> Colistin Resistance in ESBL-Producing <i>Klebsiella pneumoniae</i>, France

Abstract

We report intestinal carriage of an extended-spectrum β-lactamase-producing Klebsiella pneumoniae strain with high-level resistance to colistin (MIC 24 mg/L) in a patient in France who had been hospitalized for fungal meningitis. The strain had the mcr-1 plasmid gene and an inactivated mgrB gene, which are associated with colistin resistance.