A Transperineal Biopsy of the Prostate Does Not Require Routine Antibiotic Cover.

Introduction A transperineal ultrasound-guided prostate biopsy (TPB) under local anaesthetics (LA) after a prostate MRI scan is the gold standard for performing a prostate biopsy in patients with suspected prostate cancer. It has superseded transrectal ultrasound-guided prostate biopsy (TRUSB). Historically, TRUSB by definition was performed in a contaminated environment and was routinely covered with antibiotics to reduce the risks of infection. Despite this, the rate of post-biopsy urosepsis has been documented to be as high as 5% in some series. In the transition from TRUSB to the establishment of a TPB under LA service in our unit, we continued to use a single dose of oral antibiotics for all patients attending for biopsy. The aim of this study is to establish whether the use of single-dose antibiotics has any effect on morbidity rates post-TPB. Methods A retrospective analysis of complications was carried out on 326 consecutive patients, who underwent TPB over a six-month period. One cohort of patients were biopsied with no antibiotic cover (n=149, 45.7%) as compared to another cohort who were given a single dose of oral antibiotics (n=177, 54.3%). Those patients in the group receiving antibiotics received either a single dose of co-amoxiclav or a single dose of ciprofloxacin. Patients with indwelling urethral catheters or with a urinary tract infection (UTI) were excluded from the analyses. All patients were followed- up after a multidisciplinary team meeting discussion (MDT) with either a telephone or a face-to-face consultation. Results A total of 324 (99.4%) patients did not report post-procedural complications. Two patients from the antibiotic group presented with infectious complications (1.1%); one patient was admitted with a prostate abscess and required drainage under general anaesthesia, and another was admitted with urosepsis requiring intravenous antibiotics. In the group who did not receive antibiotics, there were no complications reported, which was not significantly different compared to the antibiotic group (p=0.50). Conclusion Our results demonstrate that the routine use of single-dose antibiotics with TPB does not affect morbidity rates. On the basis of this investigation, we have now stopped using routine antibiotic cover for patients undergoing an LA TPB.