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Over 90 Percent of What Planned Parenthood Does, Part 14: Rapid HIV Testing

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HIVtestingdayWelcome to the latest installment of “Over 90 Percent of What Planned Parenthood Does,” a series on Planned Parenthood Advocates of Arizona’s blog that highlights Planned Parenthood’s diverse array of services — the ones Jon Kyl never knew about.

It’s important to be tested for HIV, the sexually transmitted virus that causes AIDS. For some people, periodic HIV testing is part of their regular health care, while others might be experiencing a scare after a high-risk encounter (for example, having unprotected vaginal or anal intercourse or sharing IV equipment with someone whose HIV status you don’t know). No matter what boat you’re in, waiting a week or more to get your results from a standard HIV test might be nerve-wracking. If that sounds like you, then a rapid HIV test — which can give you results in just 40 minutes or less — might be just what the doctor ordered.

Today is National HIV Testing Day, and HIV testing has never been easier!

Here’s a quick rundown on rapid HIV testing: A negative result on a rapid HIV test is just as accurate as a negative result from a standard test — you just don’t have to wait as long to get it. However, positive results are considered “preliminary” and another blood sample must be sent to a lab for confirmation. If that result comes back negative, you will probably be asked to come back for retesting to verify that negative result.

The rapid test, just like the standard test, is an antibody test, which means it detects the presence of antibodies in your bloodstream. Antibodies are molecules produced by your immune system, and are specially designed to attach to viruses and other invaders. Each type of antibody is shaped in such a way that they can interlock with just one type of pathogen; some antibodies might specialize in attaching to a certain strain of a cold virus while others might be shaped especially for attachment to the surface of an E. coli bacterium. So, if you’re infected with HIV, your immune system will produce antibodies that are uniquely shaped to target HIV. An HIV antibody test can sort through the many types of antibodies in your bloodstream and identify only the antibodies that are shaped specifically for targeting HIV. Continue reading →

STD Awareness: HIV and AIDS

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Our immune systems are beautiful things, refined through millions of years of evolution. The immune system’s complexity is testament to the “arms race” that has been taking place between our species and the harmful pathogens that surround us. Last century, a virus called human immunodeficiency virus (HIV) emerged, and it found a weak spot in our immune system’s armor. HIV has been exploiting this weakness ever since, and an HIV infection can eventually progress to a disease called AIDS, or acquired immune deficiency syndrome. AIDS is a condition that disables our immune system’s ability to function properly, rendering us vulnerable to a host of opportunistic infections and cancers.

Even if you don’t think you’ve been exposed, HIV testing can be a good idea.

HIV is transmitted via bodily fluids: blood, semen, pre-seminal fluid (which can be present without ejaculation), breast milk, vaginal fluids, and rectal mucus. (It can also be present in bodily fluids like amniotic fluid, cerebrospinal fluid, and synovial fluid, to which health-care workers might be exposed.) The virus is not transmitted by fluids like snot, saliva, sweat, tears, and urine — unless blood is present.

Activities that can bring you into contact with HIV-infected bodily fluids include injection drug use and sexual activities like anal, vaginal, or oral sex. It can also be transmitted to a fetus or baby during pregnancy, childbirth, or breastfeeding. In the early days of HIV, many infections occurred as a result of blood transfusions or organ transplants — though nowadays this is a rarity thanks to tissue screening. Lastly, health-care workers might be exposed to HIV through accidents involving needlesticks or cuts. Continue reading →

Book Club: The Origins of AIDS

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The Origins of AIDS
By Jacques Pepin
Cambridge University Press, 2011

Most sexually transmitted diesases go back thousands of years. Gonorrhea, for example, was first described by a Greek physician in A.D. 150, and pubic lice have been evolving right along with us since before we became Homo sapiens. This might have been one reason why it was such a shock when a strange new virus came to our attention in the early 1980s. We soon discovered that it was transmitted sexually and through infected blood, but where did it come from?

We have intriguing evidence that HIV as we know it has been in existence since at least the 1930s.

HIV has been around since before the 1980s, though it remained unnoticed and unidentified by medical science. The earliest confirmed case of HIV was in 1959, the proof found in a sample of blood from the Belgian Congo, saved in a freezer for decades and later analyzed for the virus. Other early cases of HIV infection that have retrospectively been confirmed include that of a Norwegian sailor, who must have been infected while visiting African ports in the early 1960s. He, his wife, and his child (who was apparently congenitally infected) all died in 1976, and their tissues were tested 12 years later and found positive for HIV.

Jacques Pepin — a professor and microbiologist, not to be confused with the chef of the same name — does some serious detective work to find the most plausible explanation for HIV’s origins. While he doesn’t skimp on the science, the story of AIDS’ origins can’t be told without getting into the history of Europe’s colonization of Africa in the 20th century. This period, followed by the era of post-colonization, found many societies in upheaval. Urbanization, unemployment, and migration facilitated the spread of HIV in Africa during much of the 1900s, and once it left the continent it was able to hitch a ride from host to host, traveling the world. Continue reading →