Antimicrobial Susceptibility/Resistance of Escherichia coli among the Outpatients with Urinary Tract Infections in Mostar

Urinary tract infections (UTIs) are considered to be the most common bacterial infection. Escherichia coli is the most common uropathogen in uncomplicated upper and lower urinary tract infections (70–95% of cases). The aim of this study was to examine the presence of antimicrobial susceptibility/resistance among E. coli's strains in outpatients. This retrospective study was carried out from January1st to December 31th 2017, at the Department of Microbiology, Faculty of Medicine, University of Sarajevo, in cooperation with the Microbiological laboratory of the Cantonal Hospital „Dr. Safet Mujić“, Mostar. During the research, a total of 3 148 urine samples of outpatients were examined. Our study showed that E. coli had the highest resistance to ampicillin (58%), followed by trimethoprim-sulfamethoxazole (38.4%) and amoxicillin-clavulanic acid (38.4 %), and the lowest resistance to nitrofurantoin (2.7%) and cefuroxime (4.1%). The isolated strains of E. coli showed the highest resistance to ampicillin, and the highest susceptibility to nitrofurantoin. Gender distribution of positive E. coli isolates showed statistically significant differences in favor of females.