Fluoroquinolone-Resistant and Extended-Spectrum β-Lactamase–Producing Escherichia coli Infections in Patients with Pyelonephritis, United States1
Published Date:Sep 2016
Source:Emerg Infect Dis. 22(9):1594-1603.
Corporate Authors:EMERGEncy ID Net Study Group
Fluoroquinolone-Resistant And Extended-Spectrum β-Lactamase–Producing Escherichia Coli Infections In Patients With Pyelonephritis, United States
Pubmed Central ID:PMC4994338
Description:For 2013-2014, we prospectively identified US adults with flank pain, temperature >38.0°C, and a diagnosis of acute pyelonephritis, confirmed by culture. Cultures from 453 (86.9%) of 521 patients grew Escherichia coli. Among E. coli isolates from 272 patients with uncomplicated pyelonephritis and 181 with complicated pyelonephritis, prevalence of fluoroquinolone resistance across study sites was 6.3% (range by site 0.0%-23.1%) and 19.9% (0.0%-50.0%), respectively; prevalence of extended-spectrum β-lactamase (ESBL) production was 2.6% (0.0%-8.3%) and 12.2% (0.0%-17.2%), respectively. Ten (34.5%) of 29 patients with ESBL infection reported no exposure to antimicrobial drugs, healthcare, or travel. Of the 29 patients with ESBL infection and 53 with fluoroquinolone-resistant infection, 22 (75.9%) and 24 (45.3%), respectively, were initially treated with in vitro inactive antimicrobial drugs. Prevalence of fluoroquinolone resistance exceeds treatment guideline thresholds for alternative antimicrobial drug strategies, and community-acquired ESBL-producing E. coli infection has emerged in some US communities.
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