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Objectives: The main objective of this study was to determine the prevalence of Escherichia coli among urinary tract infection (UTI) suspected patients visiting tertiary care hospital and to assess the biofi lm producing ability of E. coli isolates. Methods: A prospective cross-sectionalstudy was carried out in Biratnagar Metropolitan city, Eastern Nepal from December 2018 to May 2019. During the study 400 urine samples were collected from UTI suspected patients visiting a tertiary care hospital ofBiratnagar. Urine samples were cultured by using semi-quantitative culture technique and identifi ed. Antibiotic susceptibility testing was done by Kirby-Bauer Disk Diffusion method according to CLSI (2011) guidelines.Biofi lm assays were performed by microtitre plate method. Results: This study reported 15% prevalence of E. coli out of 400 urine samples. 100% of E. coli isolates showed resistance to both Ampicillin and Amoxicillin while 100% were sensitive to Chloramphenicol. 70% (42/60) isolates wereMulti Drug Resistance (MDR)E. coli. The maximum isolates (86.66%) were found to be biofi lm producers by microtitre plate method. Resistance to other antibiotics such as Nalidixic acid (71.11% vs 46.66%), Norfl oxacin (53.33% vs 46.66%), Cotrimoxazole (42.22% vs 26.66%) was comparatively higher among biofi lm producers than non-biofi lm producers. There was a signifi cance of association between biofi lm and MDR (p<0.05). Conclusion: There is relation between the ability of biofi lm formation and drug resistance in the bacterium resulting to the failure of antibacterial drugs.

tribhuvan university journal of microbiology/tribhuvan university journal of microbiology

Comparison of Biofilm Producing and Non-Producing Escherichia coli Isolated from Urine Samples of Patients Visiting a Tertiary Care Hospital of Morang, Nepal