[Question #12664] HSV2 & HIV Transmission

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6 months ago

This is an old press release from the U.S. National Institute of Allergy and Infectious Diseases: “Even if weeks have passed since it healed, the site of a genital herpes sore may be especially prone to being infected by HIV, U.S. researchers say. In a small but detailed study of eight HIV-negative people (all but one of them women), the researchers found a dramatically higher number of CD4 cells just under the skin where a genital herpes sore used to be. When they took samples of that skin for lab testing, they found HIV was able to replicate as much as five times more within that skin than areas that had never been affected by a genital herpes sore.” I am confused because experts always say that HIV can not pass through intact skin. What is your understanding of this, and has there been any additional research on this topic? I have HSV2 at the base of my penis where condom cannot cover. I always use a condom, but am I at increased risk of HIV transmission from females who are HIV+ because of the mechanism described above even if my lesions are fully healed?

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Terri Warren, RN, Nurse Practitioner
6 months ago
I think it is likely that there are microscopic breaks in the skin associated with asymptomatic shedding of HSV 2 that make this risky.  The very cells that HIV likes to infect are the cells that come to defend a herpes outbreak.  I think of it this way:  the t-cell is a little car, running through our blood stream.  You develop a herpes activation, outbreak or simply a shedding episode.  The little car, the t-cell, come to defend against the outbreak.  But if you are having sex with a person who has HIV infection and it is active at the time, the HIV jumps in the t-cell car and is taken around the body and results in HIV infection.  

I realize this is quite a basic way to look at this but it works for me.  I hope it works for you.
If you are having sex with a person who is HIV positive, you should be using condoms, no question, or even if you don't know their HIV status.  

Does this make sense to you?

Terri
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6 months ago

Thanks for the reply. I always use a condom, but as I said, it does not cover the base of my penis. So, I am wondering if you think its possible or likely that when a woman's vaginal fluids or blood comes into contact with that intact skin at the base of my penis, am I at risk of HIV transmission? I am thinking the following: 1. The vaginal fluids would be exposed to air at the same time they come into contact with my skin, so would the virus die before having a chance to infect me? 2. Presumably there are 10's of millions of men who have genital herpes at or near the base of their penis - a place which can't be covered by a condom. So, if it were possible for the virus to pass through intact skin at a previous site of genital herpes wouldn't we have millions of men (who use condoms) contracting HIV through this situation?? 3.  There are many studies with discordant couples that show near 100% protection when condoms are correctly used and don't fail, which again seems to point to it being unlikely for transmission through intact skin even at the site of previous herpes infection. What does the research show, and what do you think based on your many years of experience with this?

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Terri Warren, RN, Nurse Practitioner
6 months ago
I think if you have no lesions at the time of intercourse with a woman who has HIV that transmission of HIV to you is very unlikely indeed!  Most vaginal secretions would come in contact with the area of your penis covered by a condom.  And you are correct - if this was a common occurrence, we would hear all about it.  I'm sure it is highly unlikely to happen.  Condoms reduce transmission from men to women by 96%, which is probably the statistic you are citing here.  We are talking about the reverse.
The other thing is, how often are you having intercourse with an HIV infected female, one who is not on HIV treatment?  

Terri
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