In VitroAntimicrobial Resistance of Urinary Escherichia coli Isolates among U.S. Outpatients from 2000 to 2010

Abstract

ABSTRACTThis study examinesin vitroantimicrobial resistance data fromEscherichia coliisolates obtained from urine samples of U.S. outpatients between 2000 and 2010 using The Surveillance Network (TSN). Antimicrobial susceptibility results (n= 12,253,679) showed the greatest increases inE. coliresistance from 2000 to 2010 for ciprofloxacin (3% to 17.1%) and trimethoprim-sulfamethoxazole (TMP-SMX) (17.9% to 24.2%), whereas nitrofurantoin (0.8% to 1.6%) and ceftriaxone (0.2% to 2.3%) showed minimal change. From 2000 to 2010, the antimicrobial resistance of urinaryE. coliisolates to ciprofloxacin and TMP-SMX among outpatients increased substantially.