Can antibiotics used to treat chlamydia be used for any other type of infections? A friend of mine has had pain and swelling in one of his testicles on and off for around a year, he was a virgin when this first was occuring but is now sexually active with one partner and his only partner, his partner lost her virginity to him also, he had scans and shows a worm like image off the affected testicle.. Doctor prescribed antibiotic to cover chlamydia. Seems strange.. He now has to wait for results and his partner thinks he has been unfaithful due to the prescription...