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Unprotected Oral Sex and kissing with Canker Sores

Question: 

Does receiving unprotected Oral sex (blow job) from a woman of unknown HIV status warrant for a HIV test. I know it is a low risk scenario but should I go for HIV testing to relieve myself of anxiety. I also deep kissed here and realized that I had a small canker sore inside my lower lip, if she had any blood in her mouth, will it increase my risk of contracting the virus. There was no vaginal and anal intercourse, we just performed the above mentioned acts. This was my first sexual experience in life, can it be a reason I am so anxious. The girl has been messaging me to have sex but I have been avoiding her just because she had multiple partners and I don't know how to ask her about her HIV status. One of the reason of avoiding her is my anxiety of STDs as well. I feel so guilty of my already unprotected exposure that I don't even want to have protected sex.

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking about the risk of acquiring HIV from receiving oral sex. From the information given, this scenario is determined to be of Negligible Risk. (There are no evidence or no documented cases of transmission. However, there is a theoretical possibility of transmission under certain extenuating circumstances).

Although saliva can contain trace amounts of HIV, there is not enough of the virus for sufficient transmission. Saliva contains enzymes that breakdown the virus within the mouth, thus is a protective factor against HIV. The risk of HIV transmission through oral sex is extremely low, several factors may increase that risk, including sores in the mouth or vagina or on the penis, bleeding gums, oral contact with menstrual blood, and the presence of other sexually transmitted diseases (STDs). However, using a barrier like a condom or dental dam during oral sex can further reduce the risk of transmitting HIV, and other STDs.

To address your other theoretical question, an individual engaging in protected sex with a partner of unknown status can potentially satisfy the transmission equation. Bodily fluid that contains HIV (blood, semen (including pre-ejaculate), vaginal fluids, breast milk, and rectal secretions) can have direct access to the bloodstream through protected sex if improper use of a condom occurs (1). Routine testing (every 3 months) is encouraged if engaging in protected and unprotected sex with individuals of unknown HIV status.

Recommendation: There are no evidence or no documented cases of transmission. Refer to a healthcare professional for more personalized answers

Best regards,

AIDS Vancouver Helpline/Online, Jason

Additional Resources:

HIV Transmission Equation (1) (<--clickable link)