Purpose: A prostate abscess is a rare occurrence often caused by immune dysfunction. The diagnostic modality for a prostate abscess is computed tomography or transrectal ultrasound. Transrectal ultrasound-guided aspiration is one such method. If treatment is dependent on the abscess size. This study examined the bacterial strains drained under transrectal ultrasound and their antibiotic sensitivity. Materials and Methods: The medical records of eight patients diagnosed with a prostatic abscess

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... nd treated by transrectal ultrasound-guided aspiration from March 2009 to December 2020 were reviewed retrospectively. The general characteristics, associated diseases, and bacterial strains and their antibiotic sensitivities were identified in blood, urine, and pus cultures. Results: Eight patients were hospitalized. The average age was 59.5±6.05 years, and the average length of hospitalization was 16.88±5.49 days; 75% had diabetes. No patients had catheterization, spinal injury, or prostate biopsy prior to diagnosis. The mean prostate volume was 47.05±27.3 ml, and the mean prostate abscess size was 2.08±0.83 ml. Under transrectal ultrasonography, the prostate abscess size was 5.43±5.31 ml, and catheters were inserted for treatment in four cases (50%). In the abscess culture test, Escherichia coli, Klebsiella pneumoniae, and Staphylococcus aureus were found in four, three, and one case, respectively. E. coli and K. pneumoniae responded well to amikacin treatment, while seven cases responded well to Piperacillin/Tazobactam treatment. Conclusions: Prostate abscesses occur mainly in diabetic patients. The most common cultures are E. coli and K. pneumoniae. Intravenous injection of amikacin or Piperacillin/Tazobactam may be helpful as a treatment prior to bacterial identification.