Introduction: This study aims to evaluate the patients who developed urinary tract infection after transrectal ultrasoundguided prostate biopsy and to determine antibiotic resistance profiles in urinary cultures after prostate biopsy. Methods: Between 2015 and 2019, 892 patients who underwent transrectal ultrasound-guided prostate biopsy because of suspected rectal examination and/or increased PSA level were retrospectively reviewed. Urine cultures of all patients before biopsy were sterile. All patients received oral ciprofloxacin prophylaxis, starting three days before prostate biopsy. Standard 12 quadrant prostate biopsies were performed to all patients. Forty-five patients who were admitted to the hospital again due to fever, dysuria or sepsis were included in this study. In these cases, microorganisms and resistance status were investigated. Results: Forty patients had complaints of dysuria, 17 patients had fever with tremors, and one patient had sepsis. No prostate abscess was detected on ultrasound. The rate of urinary tract infection after ciprofloxacin prophylaxis was 5.04% and 1.90% of the patients had fever after prostate biopsy. Reproduction was detected in 77,7% of urine cultures performed after the biopsy. The most commonly isolated microorganisms were Escherichia coli (71.4%), Klebsiella pneumoniae (20%), and Staphylococcus spp (8.5%), respectively. Blood culture was obtained from 37.7% of the patients, and the reproduction rate was 64.7%. E. coli was the most frequently isolated agent in blood culture. In urine culture, methicillin resistance in staphylococci was 66.6%, Extended Spectrum Beta-Lactamase (ESBL) rate in E. coli was 56%, ciprofloxacin resistance was 91,4%, trimethoprim-sulfamethoxazole resistance was 54.2% and gentamicin resistance was 25.7%. Discussion and Conclusion: Nearly all patients who developed urinary tract infection after prostate biopsy had ciprofloxacinresistant microorganisms in urine cultures. Targeted antibiotic use can be considered to reduce post-biopsy infection. Also, alternative agents as prophylaxis can be used.