I am a male in Canada. At the beginning of the month, I was at a massage parlour and saw a CSW there. She unexpectedly performed oral on me for a very short amount of time (about 5 seconds). There were also times when my penis came dangerously close to the outside of her vagina and probably touched on occasion. There was no penetration.  In reading similar situations that other users have asked you have mentioned that these are essentially no risk events in terms of  HIV. But still, I do not feel completely at ease. Other literature online suggests that there can be some risk if there are ulcers or bleeding gums present in the mouth. I am also a bit concerned of bodily fluids entering through the urethra.  One study I looked at suggested that up to 7% of new HIV cases can be attributed to oral and that HIV spread may be more prevalent than initially thought. I can provide links if you like. In terms of other STIs, I have had no symptoms since this encounter. Am I worrying needlessly? Do you recommend testing? And can I continue regular sexual activity? 

Regarding other STIs, your risk is low, both because most commercial sex workers do not have STIs and because you have no symptoms now, a month out from your exposure.  If you  would feel better by proving that you were not infected, a 4th generation test for HIV would detect more than 99% of recent infections and a urine test for other, more common STIs such as gonorrhea and chlamydia would be conclusive at this time.

Regarding the duration of your exposure, while it makes common sense that shorter duration exposures would be less likely to result in transmission of infection, there are no studies on this issue.

Bottom line, in my opinion, you have absolutely nothing to worry about in terms of either STI or HIV.  Personally, I would not even bother to test although that is certainly a personal decision.  Take care.  EWH

Thanks for the response. I order to provide some closure, I got a hold of some rapid hiv tests (insti). I am reading that the window period is 3 months but most positive results will be caught within 4-6 weeks (somewhere between 80-95%?). As I have tested negative, can I be somewhat reassured? 

. Also happy 4th from north of the border 

I hope the information I have provided has been helpful.  We provide up to three responses to each client's questions.  This therefore will be the final response.  There should not be a medical or scientific need for further questions related to this virtually no risk encounter.  I wish you the best. Please don't worry.  EWH