Question

Chlamydia infection is the leading cause of _______________ in men under age 35.

Answer 1

Answer: urethritis

Chlamydia trachomatis is obligate intracellular bacteria that can cause urinary tract infection. Mostly it will only cause urethritis and won't attack prostate, epididymis, or testis.
It is one of the STD that can be cured but hard to detect because it might be asymptomatic.