the Risks of HIV and Syphilis Transmission in Sexual Encounters - Urology

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Syphilis/HIV infection


Hello doctor, I have read online that HIV and syphilis are mostly transmitted through unsafe sexual practices and blood.
About 10 days ago, I engaged in a transaction with a sex worker.
There was no oral sex involved, and I used a condom during vaginal intercourse until ejaculation.
There was no deep kissing or tongue kissing (no lip-to-lip contact), only light kisses on each other's neck and collarbone (both parties did the same).

1.
What is the likelihood of contracting HIV or syphilis in this situation?
2.
Does the transmission of syphilis include light kissing (for example, kissing on the cheek, not lip-to-lip) or sharing a drink?

Dani, 20~29 year old female. Ask Date: 2020/09/09

Dr. Cai Zhuorong reply Urology


The question you raised is a good one, but rather than worrying, it's better to consider accepting anonymous screening.

Reply Date: 2020/09/09

More Info


When it comes to understanding the risks of HIV and syphilis transmission during sexual encounters, it is essential to consider the nature of the activities involved, the presence of protective measures, and the overall context of the interaction.

1. Risk of HIV Transmission:
Based on the information provided, your encounter involved the use of a condom during penetrative intercourse, which significantly reduces the risk of HIV transmission. Condoms are highly effective in preventing the exchange of bodily fluids that can carry the virus. Since you did not engage in oral sex, which can also pose a risk if there are cuts or sores in the mouth, your risk remains low. The absence of deep kissing or tongue kissing further minimizes the risk, as these activities are less likely to result in transmission unless there are open sores or bleeding gums involved.

The Centers for Disease Control and Prevention (CDC) outlines that HIV is primarily transmitted through:
- Unprotected anal or vaginal sex with an infected person.

- Sharing needles or syringes with someone who is infected.

- From mother to child during childbirth or breastfeeding.

Given that you used a condom and did not engage in high-risk behaviors, the likelihood of contracting HIV from this encounter is quite low. However, it is always advisable to get tested for peace of mind, especially if you have concerns.

2. Risk of Syphilis Transmission:
Syphilis is primarily transmitted through direct contact with syphilis sores during sexual activity. These sores can occur on the genitals, anus, or mouth. While kissing can transmit syphilis if one partner has an active sore, the risk from light kissing on the neck or collarbone is minimal. Drinking from the same cup does not pose a significant risk for syphilis transmission, as the bacteria do not survive long outside the human body and are not transmitted through saliva in casual contact.

The CDC states that syphilis can be transmitted through:
- Direct contact with a syphilis sore during vaginal, anal, or oral sex.

- Less commonly, through non-sexual contact with an infected person’s sores.

Since you did not engage in activities that would involve direct contact with sores, and given that your kissing was not deep or intimate, the risk of contracting syphilis is also low.

3. General Recommendations:
- Testing: It is recommended to get tested for both HIV and syphilis after potential exposure, especially if you have any symptoms or concerns. Testing is crucial because many sexually transmitted infections (STIs) can be asymptomatic in their early stages.

- Safe Practices: Continue to practice safe sex by using condoms consistently and correctly, and consider regular STI screenings if you have multiple partners or engage in high-risk behaviors.

- Education: Stay informed about the transmission routes and symptoms of STIs. Understanding how these infections spread can help you make safer choices in the future.

In conclusion, while your risk of contracting HIV and syphilis from the described encounter appears low, it is always prudent to consult with a healthcare provider for personalized advice and testing. Regular health check-ups and open communication with sexual partners about STI status are key components of maintaining sexual health.

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