It's possible, but rare, to pass chlamydia to the throat through an act of oral sex your risk of getting chlamydia and other sexually transmitted diseases (STDs). Chlamydia is a bacterial STI that a person with the infection can pass on by having anal, oral, or vaginal sex without a condom. Men can get. Untreated chlamydia can cause serious complications, so it's important to get regular Having oral sex with someone who has the infection raises the risk for.