Rev Esp Quimioter 2015:28(5):263-266

Evaluation of antibiotic resistance of Escherichia coli in urinary tract infections in Primary Care Barbastro Sector (Huesca)     


Objectives. Evaluate the resistance of community-uropathogen, Escherichia coli to several antibiotics in our health sector and deduce empirical treatment options.
Methods. E. coli strains isolated from urine cultures of patients from Primary Care Barbastro Sector, between January 2011 and December 2013, were studied. The resistances rates for nine common antibiotics were determined, and differences in sensitivity were analyzed, comparing confidence intervals for proportions by the method of Wilson.
Results. E. coli was the most frequently isolated bacteria (61.08% of positive urine cultures sent from Primary Care). Overall, there has been an increase in resistance of E. coli isolates in all antimicrobials studied. Still, resistance has remained below 4% compared to fosfomycin and nitrofurantoin and below 10% in cephalosporins second and third generation. Resistance to amoxicillin-clavulanate has increased progressively reaching 21.5% in 2013; only this antibiotic has presented a statistically significant increase. The maximum levels of resistance (over 30%) were found in the antibiotics administered orally and often indicated in uncomplicated urinary tract infections: trimethoprim-sulfamethoxazole, ciprofloxacin and ampicillin.
Conclusions. Update knowledge susceptibility patterns of microorganisms most commonly isolated in urine samples in each health area allows to choose the most suitable and effective treatments trough empirical knowledge.

Rev Esp Quimioter 2015:28(5):263-266 [pdf]