Abrupt emergence of a single dominant multidrug-resistant strain of Escherichia coli
Drug Resistance, Multiple, Bacterial
Escherichia coli Infections
Most current fluoroquinolone-resistant E. coli clinical isolates, and the largest share of multidrug-resistant isolates, represent a highly clonal subgroup that likely originated from a single rapidly expanded and disseminated ST131 strain. Focused attention to this strain will be required to control the fluoroquinolone and multidrug-resistant E. coli epidemic.