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male urethral transmission Jul 3, 2003 Dear Sir or Madam, > > I read your article on HIV on PubMEd. I have some > questions to which I would greatly appreciate your > answers. I hope that's ok. It will help with my > lectures to medical students. > In a heterosexual male, what time duration is > necessary during unprotected vaginal sex with an HIV > positive woman for HIV to enter the male via the > urethra? Is an STD sore or lesion usually crucial > for > HIV transmission? Or can it occur straight though > the > urethra? What is the percenytage chance of a > one-time > sexual contact for successful HIV transmission to > occur in a male without any history of stds? > > Thank you. R. Cooper |
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| Response from Dr. Horwath
 Some of your questions do not have precise answers, but here goes. The time duration of exposure during vaginal sex in order for HIV to cross the male urethra is not known. We can say that vaginal sex poses a signigicant risk to the man and the woman inolved, if no precautions are taken. The efficiency of infection is much higher in male to female than female to male transmission. The presence of genital ulerations increases the risk of transmission, but is certainly not a requirement. The lowest chance of infection is associated with using barrier protections (condoms, etc.) during sex. This cannot be said often enough. | |||||||||
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