Widespread Distribution of Urinary Tract Infections Caused by a Multidrug-Resistant<i>Escherichia coli</i>Clonal Group

In three geographically diverse communities, a single clonal group accounted for nearly half of community-acquired urinary tract infections in women that were caused by E. coli strains with resistance to trimethoprim-sulfamethoxazole. The widespread distribution and high prevalence of E. coli clonal group A has major public health implications.