Abstract
The prevalence of antimicrobial resistance in urinary pathogens is increasing worldwide. Accurate bacteriologic records of urine culture results may provide guidance for empiric therapy before sensitivity patterns are available. Among 461 urinary isolates from patients with uncomplicated urinary tract infection, Escherichia coli and Klebsiella species were the most common pathogens, accounting for 79% of the isolates. The prevalence of resistance among E coli and all isolates combined was more than 50% for ampicillin and tetracycline. Among E coli, the prevalence of resistance to trimethoprim-sulfamethoxazole was 39%; for amoxicillin-clavulanate it was 19%; for nalidixic acid it was 13%; for nitrofurantoin it was 13%; and for norfloxacin it was 12%. The resistance patterns of all isolates combined were similar to those of E coli alone, and the best susceptibility profiles were seen with nitrofurantoin, nalidixic acid, and norfloxacin.