Prostatitis (Acute and Chronic)

Prostatitis is inflammation of the prostate gland, and for USMLE Step 1 purposes, the highest-yield form is acute bacterial prostatitis. This is a clinical presentation question — the exam gives you a man with fever, chills, dysuria, perineal pain, and a tender, boggy prostate on rectal exam, and expects you to identify the causative organism, choose the right antibiotic, and know what NOT to do during the workup. Chronic prostatitis and chronic pelvic pain syndrome are lower yield and rarely show up as the primary focus of a question.

The exam tests this narrowly: one presentation, one organism class, one treatment, and one key contraindication. The tricky part is that students sometimes conflate acute bacterial prostatitis with STIs — especially in younger men — and reach for coverage against Chlamydia or Gonorrhea. That's wrong for most cases. The dominant pathogens are gram-negative enteric bacteria, E. coli above all others, and fluoroquinolones are the treatment of choice because they achieve excellent prostate tissue penetration.

The other gotcha — and this is the one that shows up in clinical vignettes — is the diagnostic workup. Students assume you should do a prostate massage or biopsy to confirm the diagnosis, which is what you'd do in other prostate conditions. In acute bacterial prostatitis, that's contraindicated. Manipulating an acutely infected prostate can seed bacteria into the bloodstream and precipitate sepsis. USMLE Step 1 will test whether you know to avoid this.