The aim of the study was to determine the risk of urinary tract infection (UTI) following rigid cystoscopy in outpatients with positive urine culture and antibiotic treatment compared to outpatients with negative urine culture and without antibiotic prophylaxis. A prospective pilot study in two groups of patients was conducted in a third-level hospital in Cali, Colombia. Group 1 comprised asymptomatic patients with positive urine culture and group 2 were asymptomatic patients with sterile urine. UTI and urosepsis were assessed after seven and 30 days. Eighty-nine patients, 13 from group 1 and 76 from group 2, were followed up in this pilot study. General incidence of UTI at the seventh or 30th day was 4.5% (4/89). There were no statistically significant differences in risk of UTI or urosepsis at the seventh or 30th day between the two groups. The risk of UTI following rigid cystoscopy in outpatients with positive urine culture and antibiotic treatment did not differ significantly from the risk in outpatients with negative urine culture without antibiotic prophylaxis at day 7 and 30.