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Fluoroquinolone-Resistant Urinary Isolates of Escherichia coli from Outpatients Are Frequently Multidrug Resistant: Results from the North American Urinary Tract Infection Collaborative Alliance-Quinolone Resistance Study

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American Society for Microbiology
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PMC
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Abstract

Ciprofloxacin-resistant Escherichia coli isolates (n = 1,858) from outpatient midstream urine specimens at 40 North American clinical laboratories in 2004 to 2005 were frequently resistant to ampicillin (79.8% of isolates) and trimethoprim-sulfamethoxazole (66.5%); concurrent resistance to cefdinir (9.0%) or nitrofurantoin (4.0%) was less common. Only 10.8% of isolates were resistant to ciprofloxacin alone. Fluoroquinolone-resistant isolates of E. coli from urine were frequently multidrug resistant.

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