Patient : Is it possible that bacteria naturally found in the colon could cause an infection after unprotected anal sex? I was tested before I had sex with my boyfriend and I did not have any STIs, he was tested before me and he too was clean, but now he is showing symptoms that are typical of the bacterial STIs, and we don't know what has happened.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.