A retrospective study was conducted in five hospitals to observe the prevalence of organisms causing UTI and their sensitivity to antibiotics.

Methodology: Altogether, data from five hundred samples of urine from five hospitals in Kathmandu was collected for this study from January 2005 to April 2005.

Result: A total of 244 samples were found to be positive. Altogether six types of organisms were isolated as the causative factors. E. coli (49%), S.aureus, (coagulase positive) (23%), Proteus species (3.6%), Klebsiella (9.71%), Pseudomonas (0.8%) and Citrobacter (2.8%). Analysis of the samples showed that UTI was more common in females of younger age group as compared to males. The common age group for females was 21-30 years, whereas that for males was 31-40 years in all the hospitals except in hospital A, where the maximumnumber of females was from 31-40 years and males were between 71-80 years. The most common organism to cause UTI was found to be E. coli (49%), followed by S.aureus (23%) and Klebsiella (9.71%). All the organisms causing UTI were sensitive to nitrofurantoin and amoxycillin and ciprofloxacin was found to be least effective. Similarly, in three hospitals, B (88.2%), D (64.7%) and E (65.3%), amoxycillin was found to be most effective, amikacin and gentamycin (92.5%) was most effective in hospital C, and nitrofurantoin in hospital A (78%). The second commonest organism, i.e., S. aureus (23%) was most sensitive to cephalosporin (88.8%) of second generation, followed by nitrofurantoin (77.7%), amikacin (80.6%) and norfloxacin (65.5%). The third common organism, Klebsiella (9.71%) was most sensitive to norfloxacin (75%) and nitrofurantoin (75%). Lastly, Pseudomonas was resistant to all the antibiotics in hospital A, D and E, nil in hospital B and sensitive to amikacin (100%) in hospital C.