December 27, 2003
What Is HIV Testing?HIV testing tells you if you are infected with the Human Immunodeficiency Virus (HIV) which causes AIDS. These tests look for "antibodies" to HIV. Antibodies are proteins produced by the immune system to fight a specific germ.
Other "HIV" tests are used when people already know they are infected with HIV. These measure how quickly the virus is multiplying (a viral load test, see Fact Sheet 413) or the health of your immune system (a T-cell test, see Fact Sheet 412).
How Do I Get Tested?You can arrange for HIV testing at any Public Health office, or at your doctor's office. Test results are usually available within two weeks. In New Mexico, call the AIDS Hotline at 1-800-545-2437 to find a test site. In other states, call the National AIDS Hotline, 1-800-342-2437.
The most common HIV test is a blood test. Newer tests can detect HIV antibodies in saliva, a scraping from inside the cheek, or urine. "Rapid" HIV test were approved in November 2002 and December 2003. Rapid test results are available within 10 to 30 minutes after a blood sample is taken. A positive result on any HIV test should be confirmed with a second test.
Home test kits: You can't test yourself for HIV at home. The "Home Access" test kit is only designed to collect a sample of your blood. You send the sample to a laboratory where it is tested for HIV.
About 5% of people take longer than two months to produce antibodies. There is one documented case of a person exposed to HIV and hepatitis C at the same time. Antibodies to HIV were not detected until one year after exposure. Testing at 3 and 6 months after possible exposure will detect almost all HIV infections. However, there are no guarantees as to when an individual will produce enough antibodies to be detected by an HIV test. If you have any unexplained symptoms, talk with your health care provider and consider re-testing for HIV.
The viral load or nucleic acid tests are generally not used to see if someone has been infected with HIV because they are much more expensive than an antibody test. They also have a slightly higher error rate.
What Does It Mean if I Test Positive?A positive test result means that you have HIV antibodies, and are infected with HIV. You will get your test result from a counselor who should tell you what to expect, and where to get health services and emotional support.
Testing positive does not mean that you have AIDS (see Fact Sheet 101, What Is AIDS?). Many people who test positive stay healthy for several years, even if they don't start taking medication right away.
If you test negative and you have not been exposed to HIV for at least three months, you are not infected with HIV. Continue to protect yourself from HIV infection (see Fact Sheet 150, Stopping the Spread of HIV).
Can I Keep the Test Result Confidential?
You can be tested anonymously in New Mexico. You do not have to give your name when you are tested at a public health office, or when you receive the test results. You can be tested anonymously for HIV as many times as you want.
If you get a positive HIV test that is not anonymous, or if you get any medical services for HIV infection in New Mexico, your name will be reported to the Department of Health. See Fact Sheet 301 for more information on HIV reporting in New Mexico.
The Centers for Disease Control (CDC) proposed in late 1998 that all states keep track of the names of HIV-infected people. This proposal has not yet taken effect.
How Accurate Are the Tests?
Antibody test results for HIV are accurate more than 99.5% of the time. Before you get the results, the test has usually been done two or more times. The first test is called an "EIA" or "ELISA" test. Before a positive ELISA test result is reported, it is confirmed by another test called a "Western Blot."
Two special cases can give false results:
Children born to HIV-positive mothers may have false positive test results for several months because mothers pass infection-fighting antibodies to their newborn children. Even if the children are not infected, they have HIV antibodies and will test positive. Other tests, such as a viral load test, must be used.
As mentioned above, people who were recently infected may test negative if they get tested too soon after being infected with HIV.
The Bottom Line
HIV testing generally looks for HIV antibodies in the blood, or saliva or urine. The immune system produces these antibodies to fight HIV. It usually takes two to three months for them to show up. In rare cases, it can take longer than three months. During this "window period" you will not test positive for HIV even if you are infected. Normal HIV tests don't work for newborn children of HIV-infected mothers.
In New Mexico, you can get tested anonymously for HIV. Once you test positive and start to receive health care for HIV infection, your name will be reported to the Department of Health. These records are kept confidential.
A positive test result does not mean that you have AIDS. If you test positive, you should learn more about HIV and decide how to take care of your health.
This document was provided by the New Mexico AIDS InfoNet.