AKT-3505

A 25-year-old man returned from holiday to Greece a few days ago. He is complaining of unilateral, posterior, left, scrotal swelling, dysuria, and a purulent discharge from his penis. He admits to having unprotected sex with a number of different women during the week’s holiday.

On examination there is left scrotal swelling and tenderness, and a purulent discharge from the urethra. Which one of the following is the most likely diagnosis?