Synopsis
Recognise acute bacterial prostatitis, distinguish sepsis and retention, obtain useful cultures and prescribe prostate-penetrating treatment with an explicit fourteen-day review.
- Acute bacterial prostatitis causes fever, pelvic or perineal pain and urinary symptoms, sometimes with retention or sepsis.
- A gentle rectal examination may support diagnosis, but do not massage an acutely inflamed prostate.
- Send a midstream urine culture before antibiotics and take blood cultures when febrile or systemically unwell.
- Hospital referral is indicated for sepsis, retention, inability to take oral treatment or failure to improve within 48 hours.
- NICE oral options are ciprofloxacin 500 mg twice daily or ofloxacin 200 mg twice daily for 14 days then review, only when fluoroquinolone use is appropriate.
- When a fluoroquinolone is inappropriate, trimethoprim 200 mg twice daily for 14 days then review is an alternative guided by resistance risk.
- At 14 days, stop or continue for a further 14 days according to symptoms, examination and culture rather than prescribing four weeks automatically.
- Image and seek urology input when fever or pain persists despite active treatment because an abscess may need drainage.
Key red flags
Hypotension, tachypnoea, confusion or mottling indicates sepsis requiring emergency escalation.
Acute inability to pass urine with a painful bladder requires urgent urological drainage planning.
Persistent fever after 36 to 48 hours of active therapy raises concern for prostatic abscess.
Recent biopsy, catheterisation or resistant isolate increases healthcare-associated and resistant organism risk.
Severe pelvic pain with immunosuppression or diabetes lowers the threshold for admission and imaging.
Fever, rigors, malaise, dysuria, frequency and urgency with perineal, rectal, penile or low-back pain supports acute bacterial prostatitis.
Weak stream, painful inability to void and palpable bladder suggests oedema-related outlet obstruction requiring prompt urological assessment.
Persistent fever, bacteraemia or focal pelvic pain despite active therapy raises suspicion for a collection requiring imaging and drainage.
Investigation priorities
Confirm the organism and guide a prostate-penetrating regimen before antibiotics.
Management branches
Acute bacterial prostatitis is likely, oral absorption is reliable and there is no sepsis, retention or abscess concern.
- Obtain culture and assess renal function, allergy, previous isolates, recent antibiotics, interactions and individual fluoroquinolone adverse-effect risk.
- Choose a prostate-penetrating NICE regimen: ciprofloxacin or ofloxacin only when appropriate, or trimethoprim when a fluoroquinolone is unsuitable and resistance risk permits.
- Provide analgesia, hydration advice, serious adverse-effect counselling and urgent return criteria for retention or systemic deterioration.
- Review at 14 days using symptoms, examination and culture; stop or continue for a further 14 days according to that assessment.