Background and objective Urinary tract infections (UTIs) are usually treated with empirical therapy by physicians based on previous knowledge of the predictability of causative agents and their antimicrobial susceptibilities. The objective of this study was to determine the frequency of various pathogens causing UTIs and their antimicrobial resistance profile in patients presenting to the outpatient department (OPD) of a tertiary care hospital. Materials and methods This descriptive cross-sectional study was conducted in the urology OPD of a tertiary care hospital in Pakistan. The study was conducted over a period of six months, and it included 1,000 patients (of ages 12 years or above) who were clinically suspected for UTIs. Patients with comorbidities and immunocompromised patients were excluded from the study. Recipients of corticosteroid therapy or those with a history of intake of broad-spectrum antibiotics in the previous 15 days were also excluded. The modified Kirby-Bauer disc diffusion method was used for determining antimicrobial resistance against various antimicrobials. Results Out of 1,000 tested specimens, 530 (53%) isolates were found to be culture-positive. E.coli was the most common species isolated from the cultures with a prevalence of 77.4%, followed by Klebsiella (6.4%), Enterobacter (6.0%), Pseudomonas (3.8%), Staphylococcus saprophyticus (3.4%), Citrobacter (1.1%), and Morganella (0.4%). Antimicrobial resistance against commonly used antimicrobials was found to be alarmingly high.
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