Introduction : Extended-spectrum ?-lactamase (ESBL) is a mutated ?-lactamase enzyme that can hydrolyze beta-lactam antibiotics. The aim of this study was to determine the incidence rate, characteristics of patients, antibiotic use and outcome of urinary tract infections (UTIs) due to ESBL-producing Escherichia coli and Klebsiella pneumoniae at Dr Zainoel Abidin General Hospital Aceh.Method : The samples of this study were all Escherichia coli and Klebsiella pneumoniae isolated from urine culture of UTI cases. Patient characteristics and antibiotic use data were extracted from medical records. UTIs outcome was assessed as clinical improvement or death within a maximum of 30 days of treatment.Result : The results of this study obtained 63 patients with UTIs caused by E. coli and K. pneumonia of which 52.4% of them were ESBL producers. The incidence of UTIs due to E. coli was higher than that of K. pneumoniae, 63.5% and 36.5% respectively. E. coli ESBL producers were more in number than non-ESBL, conversely K. pneumoniae were mostly non-ESBL. The characteristics of patients with UTIs caused by E. coli and K. pneumoniae were predominant women 52.4%, and most cases were at 56-64 years old. Antibiotic therapy that given before and after culture results to UTI patients were generally ceftriaxone. UTIs outcome due to ESBL producing Escherichia coli and Klebsiella pneumoniae showed that 26/33 (78.8%) patients experienced improvement, however, 7/33 (21.2%) patients died.Conclusion : The irrational use of ceftriaxone in patients with UTI caused by ESBL producing E. coli and K. pneumoniae has led to a poor outcome for the patient.
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