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STD after receiving unprotected oral sex - HIV risk?

Question: 

Hello,

I received unprotected oral sex from a sexworker a few days ago and was a infected with a STD. I went to see an urologist today and was prescribed antibiotics. The urologist said, that the risk to get infected with HIV by receiving oral sex is very low and as stated in many threads in this forum, it may even be a negligible risk activity. However, I am still very concerned if the presence of a STD in the sexworkers mouth or throat increases the risk of a transmission.
The oral sex was performed for about 3-4 minutes and I did not see any blood on my penis afterwards. The only thing that I noticed afterwards was a strong and very bad oral smell which I did not notice before. I assume the sexworker had a bad oral hygiene.

I feel very concerned and guilty because of this situation. It would be great if you could provide me information on how an STD or bad oral hygiene could increase the risk of HIV transmission in receiving oral sex and how you would evaluate this situation based on your experience.

Sorry for my poor English, I am not a native speaker. And thank you for the important information you provide here and your commitment to help people like me!

Best regards,
F

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the risk of HIV transmission in receiving unprotected oral sex and how an STI may increase that risk. From the information given, this scenario is determined to be negligible risk (There are no evidence or no documented cases of transmission). Receiving oral sex presents a potential for HIV transmission because they do involve the exchange of body fluids. However, there has never been a confirmed report.

In regards to STI's (sexually transmitted infections) increasing the risk of HIV transmission, consider the following. Research suggests that STI's *may *increase someone's risk of transmitting HIV due to inflammation. When there is inflammation, there is an increase in activated immune CD4 cells, which are the cells that HIV like to infect and replicate in. Inflammation can bring more of the infected immune cells to the site of the STI in the genitals, rectum, or mouth [1]. Please see the link below for more detailed information.

Recommendation: There are no evidence or no documented cases of transmission refer to Physician for more personalized answers

Regards, AIDS Vancouver Helpline/Online, Ashley