Emergency Department Urinary Tract Infections Caused by Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae: Many Patients Have No Identifiable Risk Factor and Discordant Empiric Therapy Is Common

At this single Northern California ED, greater than 5% of culture-proven UTI were caused by ESBL-producing Enterobacteriaceae, and in nearly half of cases there was no identifiable health care-associated risk factor. Levofloxacin co-resistance and discordant antibiotic therapy were common.