Women and HIV Viral Load
July 27, 2015
The US treatment guidelines also provide recommendations on when to have viral load tests:
The World Health Organization (WHO)'s treatment guidelines recommend that you get a viral load test six months after you begin treatment, again at 12 months after beginning treatment, and then once every year thereafter.
If your drug regimen is working, your viral load should become undetectable within six months of starting treatment. If this does not happen, if your viral load stays detectable on stable therapy, or if your viral load keeps increasing, this can mean that your drug regimen is not controlling HIV as well as it should. It is important that you and your health care provider discuss all possible reasons (e.g., problems with drug absorption, adherence, drug resistance, drug interaction with other drugs) and take steps to correct the problem. These steps may include additional testing and considering changing HIV drugs.
Our understanding of viral load has grown since 1996, when the first viral load test was approved and began to be widely used. Most early clinical trials that studied the role of viral load looked primarily at groups of men. Women were not enrolled in enough numbers in these trials for anyone to know whether there were sex-based differences in viral load.
Since 1996, a number of studies have compared viral load levels between groups of men and women. Some of these studies have found sex differences in viral load. At similar CD4 cell counts, women tend to have lower viral load levels than men. The differences seem greatest during the early course of HIV infection.
However, this difference early on does not result in any overall difference between women and men in the speed at which HIV advances and health declines. Studies have also shown that when taking HIV drugs, men and women are equally likely to achieve viral suppression. Most differences in the effectiveness of treatment appear related to which HIV drugs are taken, and not to being female or male. The strongest single factor that predicts the health of people living with HIV -- women or men -- is taking HIV drugs. Studies have not found that pregnancy causes HIV to become more advanced.
One study (March 2013) found that HIV lives and multiplies more often in the fluids in the female genital tract than in semen (cum), even when the person is on effective HIV drugs that show an undetectable viral load in the blood. Later studies have shown that the female genital tract serves as a 'reservoir' or place where HIV continues to live and reproduce despite effective HIV therapy. Staying on your HIV drugs and maintaining an undetectable viral load is still the best way to stay healthy and prevent spreading HIV to others. You can find out more about how taking HIV drugs can prevent the spread of HIV by reading our article on Treatment as Prevention.
If you are thinking about starting or switching treatment, it is important to take into account your viral load, CD4 cell count, other labs results, and how you are feeling. Talk to your health care provider about the best treatment plan for you.
Researchers have noticed that viral load and the level of certain HIV drugs go up and down during the course of a single menstrual cycle. This could have an impact on drug dosing and the timing of viral load tests in women.
Understanding more about sex differences in viral load will lead to better care for women living with HIV. In the meantime, following the treatment guidelines for viral load testing is an important way for you and your health care provider to check your HIV infection, see how you are responding to HIV treatment, and work together to keep you healthy.
This article was provided by The Well Project. Visit The Well Project's Web site to learn more about their resources and initiatives for women living with HIV. The Well Project shares its content with TheBody.com to ensure all people have access to the highest quality treatment information available. The Well Project receives no advertising revenue from TheBody.com or the advertisers on this site. No advertiser on this site has any editorial input into The Well Project's content.
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