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

Community-onset urinary tract infections (UTIs) caused by extended-spectrum β-lactamase (ESBL)–producing Enterobacteriaceae, which are resistant to ceftriaxone and usually coresistant to fluoroquinolones, are increasing worldwide. We investigate and describe in detail UTIs caused by ESBL-producing Enterobacteriaceae in our emergency department (ED), and determine the proportion that occurred in patients without health care–associated risk factors and who received discordant initial antibiotic therapy.

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