[Question #11973] Risk from Very Brief Oral Sex
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11 months ago
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What are the STD risks to a man from a female sex worker at a (not high end) US brothel/massage parlor briefly sucking his penis (two seconds) without protection? It seems like gonorrhea would be the main risk and the thing to test for. But I am curious what the odds of the man contracting gonorrhea would be?
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Edward W. Hook M.D.
11 months ago
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Welcome to the Forum. I happened to be on the Forum when your questions came in so you are receiving this reply somewhat sooner than might normally be the case. Replies to follow-up questions may take longer.
There are two parts to your questions- what are the STI risks associated with receipt of oral sex and how does the duration of exposure factor in to this.
Regarding the 1rst question, the major STI associated with receipt of oral sex is, as you point out, gonorrhea. Chlamydia, while a common genitally acquired STI is rarely acquired from receipt of unprotected oral sex, Trichomonas is not meaningfully acquired from receipt o oral sex and there are no proven cases of HIV acquired from receipt of oral sex. Finally, syphilis, while theoretically possible to acquired is only very, very rarely acquired from oral sex and on those occasions when it is, it is in the context of men having sex with other men.
As for the effect of duration on risk of infection, while it makes sense that if a partner is infected, the longer the exposure, the higher the risk, there are no studies of this variable. I would point out however that most exposures to infected partners do not result in transmission of infection and that among mechanisms of acquiring STIs, oral sex with or frim an infected partner is less likely to result in infection than genital or rectal exposure.
I hope this information is helpful. If you received oral sex from a CSW and are asymptomatic 3-5 days following it is very unlikely that you acquired an STI- the risk is so low that I would probably not bother to test unless I developed symptoms or needed the reassurance that a negative test would provide. EWH
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11 months ago
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I obviously understand if you do not wish to provide a probability, but if you do not mind, if the encounter just happened today, are the odds here around 1%? Lower?
I was thinking maybe 10% chance of the partner having gonorrhea * 10% chance of transmission = 1%, and perhaps lower because of the shortness of the encounter.
I appreciate your reply and of course do not expect that rapid a response time for these questions. Thanks for providing this important resource.
I was thinking maybe 10% chance of the partner having gonorrhea * 10% chance of transmission = 1%, and perhaps lower because of the shortness of the encounter.
I appreciate your reply and of course do not expect that rapid a response time for these questions. Thanks for providing this important resource.
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Edward W. Hook M.D.
11 months ago
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I think a 1% chance is probably in the right ball park but as I said above, there are no data to really inform the answer to this question. EWH---
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11 months ago
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Final question: What is the accuracy of a gonorrhea test two days after the encounter? I understand accuracy gets better after more time, but if one wanted peace of mind and was willing to test after two days, and then again a week after the encounter.
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Edward W. Hook M.D.
11 months ago
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Two days is highly likely to provide accurate information although there are not specific data. I would expect at least 90% reliability and perhaps higher. When this sort of reliability is combined with the low risk of your exposure I would urge you to put any lingering concerns that you might have behind you and move forward.
This completes this thread. Take care EWH
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