HIV Transmission in Heterosexual Males

[roger thornhill]

Driving in to work, I heard a report on a possible barrier to HIV/AIDS transmission in women. The report mentioned that HIV was transmitted via proteins on the outside of certain cells in the woman's vagina, whence it entered the blood stream.

My question is a simple one. What is/are the equivalent entry points for HIV into the male who contracts HIV/AIDS through heterosexual sex?

[Bear_Nenno]

It's possible, though unlikely, for the virus enter a male through the urethra. Vaginal fluid can contain HIV, but not as readily or as effectively as blood or semen. It's much more likely to be transmitted by anal sex, or by vaginal sex with open sores on the penis and/or by having sex while she is on her period.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1886189&dopt=Abstract

In a study of 379 HIV-infected people reported in a 1991 Journal of the American Medical Association, researchers found only one example of female-to-male transmission, and in that case, the couple had had several instances of vaginal or penile bleeding during intercourse.

[Flander]

It's possible, though unlikely, for the virus enter a male through the urethra. Vaginal fluid can contain HIV, but not as readily or as effectively as blood or semen. It's much more likely to be transmitted by anal sex, or by vaginal sex with open sores on the penis and/or by having sex while she is on her period.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1886189&dopt=Abstract

In a study of 379 HIV-infected people reported in a 1991 Journal of the American Medical Association, researchers found only one example of female-to-male transmission, and in that case, the couple had had several instances of vaginal or penile bleeding during intercourse.

So it's easier for a girl to get it from a guy than a guy to get it from a girl?

[roger thornhill]

Vaginal fluid can contain HIV
So it's possible for HIV to be transmitted via oral sex?

[Bear_Nenno]

So it's possible for HIV to be transmitted via oral sex?Most definitely. The mouth will usually contain microabrasions (especially if you just brushed your teeth) or cold sores. Both of which are open sores and bring blood into the equation.

So it's easier for a girl to get it from a guy than a guy to get it from a girl?Yes. HIV in the semen transmits readily through the walls of the vagina.

[roger thornhill]

Most definitely. The mouth will usually contain microabrasions (especially if you just brushed your teeth) or cold sores. Both of which are open sores and bring blood into the equation.
As I thought. Why then do government announcements - at least in Hong Kong - focus solely on the need to wear a condom? Are other countries equally coy about mentioning the perils of oral sex?

[Bear_Nenno]

This country mentions oral sex too, and even makes Flavored Condoms and "Dental Dams" for that purpose.

[roger thornhill]

Not for the first time, I feel as if I'm lagging behind. For anyone else who's not aware of them, a brief intro to dental dams (http://www.brown.edu/Student_Services/Health_Services/Health_Education/sexual_health/ssc/dams.htm), courtesy of Brown.

[MaceMan]

Actually, the risk of contraction of HIV through oral sex alone, while theoretically possible, is extremely low. Saliva kills HIV, and the risk of getting HIV through oral sex is about equivalent to getting it from deep kissing someone with oral abrasions.

I've read that intact foreskin contains some surface cells with the receptors that are required for HIV entry into a cell. There is some conjecture that circumcision might cut the risk of HIV infection through this particular route.