Urology & Infectious Diseases & Family Medicine
Prostatitis
Prostatitis refers to inflammation of the prostate gland, whether of infectious bacterial or non-infectious origin - a broad clinical spectrum grouped under the Nickel/NIH classification into four distinct categories, each with a different pathophysiology, clinical presentation and therapeutic management. Prostatitis is the most common urological condition in men under 50, accounting for up to 25 % of urological consultations, and the third most common cause of urological consultations of all ages. Category I (acute bacterial prostatitis - ABP) is the most severe form, but the rarest (1 to 5 % of prostatitis): acute bacterial infection of the prostate gland causing severe septicemia (high fever + chills + dysuria + pelvic pain + possible urinary retention), with a massively elevated PSA due to rupture of the blood-prostatic barrier, and requiring urgent IV antibiotic therapy (fluoroquinolones or cephalosporins) followed by prolonged oral relay. Category II (chronic bacterial prostatitis - CBP) is defined by recurrent episodes of identical germ urinary tract infection in a man with documented prostatic bacteriuria, treated with fluoroquinolones or trimethoprim-sulfamethoxazole for 4 to 12 weeks. Category III - chronic pelvic pain syndrome (CPPS) - is the most frequent form (90 to 95 % of prostatitis) and the most difficult to treat: chronic pelvic pain (perineum + lower abdomen + testicles + penis + lumbar region) evolving for more than 3 months, with or without leukocytes in prostatic secretions, without documented bacterial infection, and with a still poorly elucidated pathophysiological mechanism (neurological dysfunction + non-infectious inflammation + pelvic floor disorders + psychological component). Category IV (asymptomatic inflammatory prostatitis) is discovered incidentally during a prostate biopsy for elevated PSA, with no treatment required in the absence of symptoms.
NIH Classification of Prostatitis
| NIH Category | Definition | Frequency and presentation |
|---|---|---|
| Category I — Acute bacterial prostatitis (ABP) | Acute bacterial prostatitis + germ identified in urine culture + septicemic presentation | 1–5 % of prostatitis + dramatic acute presentation + frequent hospitalization necessary + medical emergency |
| Category II – Chronic bacterial prostatitis (CBP) | Recurrent urinary tract infections with the same pathogen in a man with a prostatic bacterial reservoir + chronic ± severe symptoms | 5–10 % des prostatites + épisodes récidivants d'ITU + inconfort pelvien chronique + ECBU positifs lors des poussées |
| Category IIIa — Inflammatory SDPC | Chronic pelvic pain > 3 months + leukocytes in prostatic secretions after massage + sterile cultures | 45–50 % prostatitis + complex pain syndrome without identified infection + documented inflammatory component |
| Category IIIb — Non-inflammatory SDPC | Chronic pelvic pain > 3 months + NO leukocytes in prostatic secretions + sterile cultures | 40–45 % des prostatites + forme la plus frustrante pour le patient et le médecin + mécanisme neurologique + musculaire + psychologique |
| Category IV — Asymptomatic Inflammatory Prostatitis | Histological prostatitis (biopsy) or leukocytes in secretions without symptoms | Incidental finding + no treatment required + PSA follow-up if elevated |
Acute Bacterial Prostatitis (Category I) — Presentation and Treatment
- Clinical Presentation: Sudden onset + high fever (39–40 °C) + chills + myalgias + intense pelvic and perineal pain + dysuria + urinary frequency + weak urinary stream + possible urinary retention (swollen prostate obstructing) + low back pain + possible urethral discharge + on digital rectal exam: enlarged prostate + warm + extremely tender + boggy if abscess → digital rectal exam should be performed VERY GENTLY (risk of bacteremia from manipulation of an infected prostate)
- Biological tests : NFS (major leukocytosis > 15–20 × 10⁹/L) + very high CRP + high PCT + urine culture (positive culture — E. coli in 80 % of cases + Klebsiella + Proteus + Enterococcus) + blood cultures × 2 before antibiotic therapy + very high PSA (often 10–100 µg/L — do not interpret as cancer during the acute phase — normalizes after recovery) + creatinine (urinary retention)
- Imaging : Transrectal or transabdominal ultrasound of the prostate → look for a prostatic abscess (hypoechoic collection) → if abscess → transurethral or surgical perineal drainage + CT scan if bacteremia to evaluate secondary sources
- Antibiotic therapy - urgent treatment: Mild outpatient forms: Ciprofloxacin 500 mg twice daily orally for 14 days (if urine culture shows sensitivity) or trimethoprim-sulfamethoxazole (TMP-SMX) if sensitive. Severe forms (high fever + retention + sepsis): hospitalization + ciprofloxacin IV 400 mg twice daily + or ceftriaxone 2 g IV once daily + or piperacillin-tazobactam if enterococcus is suspected + total duration: 4 to 6 weeks (difficult prostate penetration + prevention of chronicity).
- Urinary retention due to acute prostatitis: suprapubic catheter (preferred over urethral catheter—less traumatic + avoids manipulation of infected prostate) OR urethral catheter if suprapubic not possible + alpha-blockers (tamsulosin) → reduce prostatic tone + facilitate urination upon catheter removal + quinolones MUST NOT be prescribed before blood cultures and urine culture to avoid masking cultures
Chronic bacterial prostatitis (Category II)
- Introduction: recurrent episodes of urinary tract infections (cystitis + epididymitis) with the same pathogen in the same man + between flares: mild chronic pelvic discomfort + burning urination + urinary frequency + painful urination + perineal discomfort + painful ejaculation + the pathogen persists in prostatic tissue between episodes, protected by the blood-prostate barrier
- Diagnostic — Meares-Stamey test (bacterial localization): 4-glass test → culture of the first urine stream (urethra) + culture of the second urine stream (bladder) + prostatic secretions after prostatic massage + culture of the third stream (post-massage) → confirmed prostatitis if bacterial concentration in prostatic secretions > 10x concentration in pre-massage urine + rarely practiced routinely → often replaced by the 2-glass test (pre-massage + post-massage)
- Processing : fluoroquinolones (ciprofloxacine 500 mg × 2/jour ou lévofloxacine 500 mg × 1/jour) × 4 à 12 semaines → bonne pénétration prostatique + ou TMP-SMX 160/800 mg × 2/jour × 4 à 6 semaines si sensible + taux de guérison : 60–80 % sous fluoroquinolone × 4 semaines + rechutes fréquentes (30–40 %) → si récidive → rétraitement + discussion de la durée optimale avec l'urologue
Chronic Pelvic Pain Syndrome — Category III
- Complex and multifactorial pathophysiology: Pelvic floor dysfunction (perineal muscle hypertonia) + non-infectious inflammation (mast cells + cytokines) + neuroinflammation (central sensitization of pain pathways) + psychological component (anxiety + depression + catastrophizing) + urine reflux into prostatic ducts (chemical irritation) + possible local autoimmunity
- Symptoms: Chronic pelvic pain (perineum + base of penis + testicles + inguinal region + lower abdomen) for > 3 months + urinary symptoms (dysuria + frequent urination + urgency) + dysorga-sm + erectile dysfunction + major impact on quality of life + often associated with other chronic pain syndromes (irritable bowel syndrome + painful bladder syndrome)
- UPOINT Score – Guides Multimodal Therapy 6 domains: Urinary (voiding symptoms) + Psychosocial (anxiety + depression) + Specific organ (localized prostatic pain) + Infections (cultures + leukocytes) + Neurological/Systemic (diffuse pain + other pain syndromes) + Muscle tension (pelvic floor) → treatment is adapted according to positive domains
- Multimodal SCD Treatment: Alpha-blockers (tamsulosin 0.4 mg/day → reduction of urinary symptoms) + NSAIDs if inflammation is documented + antibiotic trial of 4 to 6 weeks (ciprofloxacin) if first episode + 5-alpha-reductase inhibitors if associated BPH + pelvic floor physiotherapy (biofeedback + stretching + manipulation) → very effective if muscle hypertonia + reuptake inhibitors (duloxetine + amitriptyline) if neuropathic component + gabapentin/pregabalin + psychological support (CBT + stress management) + acupuncture + low-level laser therapy (emerging data)
ℹ️
PSA can be massively elevated during acute bacterial prostatitis—sometimes 10 to 100 times normal—due to disruption of the blood-prostate barrier. This elevation is reversible and normalizes in 4 to 8 weeks after the infection has healed. Never interpret PSA in the context of acute prostatitis as a marker for cancer—wait 6 to 8 weeks after complete clinical healing before measuring PSA for prostate cancer screening purposes.
Medical emergency — acute febrile bacterial prostatitis
Consult the emergency room or call 911 if suspected acute prostatitis (severe pelvic pain + burning urination) is accompanied by high fever (≥ 38.5°C) + chills + inability to urinate (urinary retention) + or altered general state — acute bacterial prostatitis can progress to a prostatic abscess or severe sepsis requiring urgent hospitalization, IV antibiotic therapy, and surgical drainage if an abscess is present. Never treat febrile prostatitis on an outpatient basis without medical evaluation.
For the diagnosis of prostatitis, urine culture and sensitivity (ECBU), complete blood count (NFS), C-reactive protein (CRP), initiation of appropriate antibiotic therapy, and urological referral, Clinique Omicron offers medical consultations at its service points in Quebec and via telemedicine. To make an appointment, visit cliniqueomicron.ca.
Consult at Clinique Omicron
Clinique Omicron's Nurse Practitioners (NPs) diagnose prostatitis according to the NIH classification, orders urinalysis with culture and sensitivity, blood cultures, CBC, CRP, and PSA when appropriate. They initiate antibiotic treatment (ciprofloxacin, levofloxacin, TMP-SMX) for moderate acute and chronic bacterial prostatitis, refer severe cases to the emergency department, and complex chronic cases to urology and pelvic floor physiotherapy. Consultations are available at several service points across Quebec and via telemedicine. To book an appointment, visit cliniqueomicron.ca.
The content of this page is for informational purposes only and does not substitute for medical advice from a physician or urologist. Acute bacterial prostatitis with fever is a medical emergency — chronic prostatitis and chronic pelvic pain syndrome require a multidisciplinary approach and prolonged follow-up for optimal management.
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