Acute bacterial prostatitis- Management

Prostatitis is an inflammatory condition of the prostate gland, commonly caused by bacterial infection originating from urinary tract pathogens or sexually transmitted infection (STI) organisms. It may present as an acute infection or a chronic relapsing condition.

Acute bacterial prostatitis is characterized by sudden inflammation of the prostate associated with bacterial infection and may cause significant lower urinary tract symptoms, systemic illness, and complications such as urinary retention or prostatic abscess if untreated.

The causative organisms vary according to patient age and risk factors. In younger men, sexually transmitted pathogens such as Neisseria gonorrhoeae and Chlamydia trachomatis are important causes, whereas older men are more commonly affected by urinary pathogens such as Escherichia coli, Klebsiella pneumoniae, and other Gram-negative organisms.

Epidemiology

Prostatitis is one of the most common urological conditions affecting men, although the true prevalence is difficult to determine due to variation in clinical presentation and diagnostic criteria.

Acute bacterial prostatitis can occur at any age but is more frequently diagnosed in sexually active younger men and older men with urinary tract abnormalities, bladder outlet obstruction, or benign prostatic enlargement.

Risk factors

• Previous urinary tract infection

• Sexually transmitted infections

• Unprotected sexual intercourse

• Recent urinary catheterization

• Recent urological procedures

• Benign prostatic hyperplasia

• Urinary tract obstruction

• Incomplete bladder emptying

• Immunosuppression

• Diabetes mellitus

• Recurrent prostatitis

Pathophysiology

Prostatitis develops when microorganisms enter the prostate gland through ascending infection from the urethra or bladder, reflux of infected urine into prostatic ducts, or direct inoculation following instrumentation.

Bacterial invasion triggers an inflammatory response within the prostate, resulting in oedema, tissue inflammation, and obstruction of prostatic ducts. In acute infection, inflammatory swelling may compress the urethra, causing difficulty with urination and, in severe cases, acute urinary retention.

Persistent or recurrent infection may lead to chronic inflammation, fibrosis, and recurrent symptoms.

Clinical presentation

Clinical manifestations depend on whether prostatitis is acute or chronic. Acute bacterial prostatitis usually has a more sudden and severe presentation.

Symptoms

• Perineal pain

• Sacral pain

• Suprapubic pain

• Dysuria

• Urinary frequency

• Urinary urgency

• Difficulty initiating urination

• Weak urinary stream

• Incomplete bladder emptying

• Urinary retention

• Painful ejaculation

• Fever and chills in some patients

Clinical signs

• Fever

• Tender prostate on digital rectal examination

• Enlarged or swollen prostate

• Suprapubic tenderness

• Signs of urinary obstruction

• Acute urinary retention

• Features of systemic infection in severe cases

Digital rectal examination should be performed gently in suspected acute bacterial prostatitis because vigorous manipulation may increase the risk of bacteraemia.

Diagnostic criteria

Diagnosis is based on:

• Compatible clinical symptoms

• Evidence of prostate inflammation

• Laboratory confirmation of infection where available

Features supporting diagnosis include:

• Perineal or pelvic pain

• Lower urinary tract symptoms

• Positive urine analysis findings

• Positive urine culture

Investigations

Urine investigations

• Urinalysis

  • Leukocytes

  • Nitrites

  • Blood

  • Protein

• Urine culture and antimicrobial susceptibility testing

Urine culture helps identify the causative organism and guide antimicrobial selection.

Additional investigations

Where clinically indicated:

• Full blood count

• Serum creatinine

• Blood cultures in patients with fever or systemic infection

• STI testing in younger men or those with urethral symptoms

Imaging investigations

Imaging is not routinely required but may be considered in patients with:

• Failure to respond to treatment

• Persistent fever

• Suspected prostatic abscess

• Recurrent prostatitis

Possible investigations include:

• Transrectal ultrasound

• Pelvic imaging

Management

Management aims to eradicate infection, relieve symptoms, prevent complications, and identify underlying causes contributing to recurrence.

Non-pharmacological treatment

• Encourage adequate hydration.

• Encourage regular bladder emptying.

• Avoid activities that worsen perineal discomfort.

• Manage urinary obstruction where present.

• Provide counselling regarding safe sexual practices.

• Avoid unnecessary urinary catheterization.

Pharmacological treatment

Acute bacterial prostatitis

Treatment depends on the likely source of infection.

Men younger than 35 years or those with features of associated urethritis (sexually transmitted infection regimen)

• Cefixime 400 mg orally as a single dose.

Followed by:

• Doxycycline 100 mg orally every 12 hours for 7 days.

Men older than 35 years or those with associated cystitis

• Ciprofloxacin 500 mg orally every 12 hours for 14 days.

Antimicrobial therapy should be adjusted according to urine culture and antimicrobial susceptibility results where available.

Management according to underlying cause

Sexually transmitted infection-related prostatitis

• Treat according to STI guidelines.

• Ensure partner notification and treatment where appropriate.

• Counsel regarding prevention of reinfection.

Urinary tract infection-associated prostatitis

• Treat according to urine culture results.

• Evaluate for urinary tract abnormalities if recurrent.

Urinary obstruction

• Relieve obstruction.

• Assess for underlying causes such as benign prostatic hyperplasia.

• Refer for urological evaluation when necessary.

Referral

Refer to a urologist if:

• No response to antimicrobial treatment

• Acute urinary retention develops

• High fever persists despite treatment

• Suspected prostatic abscess

• Chronic or relapsing prostatitis

• Recurrent infections occur

• Underlying urinary obstruction requires specialist management

Complications

• Acute urinary retention

• Prostatic abscess

• Bacteraemia

• Sepsis

• Chronic prostatitis

• Recurrent urinary tract infections

• Persistent pelvic pain

• Sexual dysfunction

Prognosis

Acute bacterial prostatitis generally responds well to appropriate antimicrobial therapy. Early diagnosis and treatment reduce the risk of complications. Delayed treatment, resistant organisms, urinary obstruction, or recurrent infection may lead to chronic symptoms and complications.

Prevention

• Practice safe sexual behaviours.

• Early diagnosis and treatment of sexually transmitted infections.

• Prompt treatment of urinary tract infections.

• Avoid unnecessary urinary catheterization.

• Maintain good urinary hygiene.

• Manage urinary obstruction conditions promptly.

• Follow-up patients with recurrent prostatitis.