Prevalence of Fluoroquinolone-Resistant Clinical Isolates of Escherichia Coli in Urinary Tract Infection

Introduction: The commonest bacterial agent involved in causation of UTIs is Escherichia coli. The emergence of FQ resistant uropathogenic E. coli is of great concern. Aim of the work: to study resistance towards urinary E. coli with various generations of fluoroquinolones. Patients & Methods:: our study was carried out in the Clinical Pathology Department, Sohag University Hospital during the period from June 2016 to May 2017. Our study included 140 participants. Isolates from the specimens were obtained and identified using; Gram staining, colony characteristics on different culture medias. VITEC 2 Compact 15 identification kits were be used to confirm the identification of the isolates Results: E.coli was isolated from 100 patients (71%) of all patients complaining of UTI with positive urinary culture (study or case group). By studying prevalence of Antibiotic resistance of E.coli isolates reveals that fluoroquinolones show sensitivities of 42-46%. Also Nitrofurantoin has the highest sensitivity of 87%. This is followed by meropenem (67%).  Ampicillin shows sensitivity in only 6% of cases. Regarding drug sensitivity in out & inpatients, we find that all generations of fluoroquinolones show highly significant resistance ratios among inpatients compared to outpatients. Meropenem show resistance more in inpatients than outpatients, with significant difference, Ampicillin and Nitrofuratoin show non-significant difference. Conclusion: our study show an increased fluoroquinolone resistance among uropathogenic E. coli isolates mainly in hospital admitted patients.