Hiv-1 Antibody Test (elisa And Western Blot). (senior Health Advisor 2005)
What is the HIV-1 antibody test?
The HIV-1 antibody test checks your blood for antibodies to the most common type of the human immunodeficiency virus (HIV-1). HIV is the virus that causes AIDS (acquired immunodeficiency syndrome), a life-threatening disease. If you are infected with HIV, your immune system makes a type of protein called an antibody to try to destroy or get rid of the virus.
There are different HIV
antibody tests. One test is the ELISA (enzyme-linked immunosorbent
assay). If the ELISA test is positive, a second test called a Western
blot is done to confirm the result. The Western blot takes longer to
perform and is more expensive than the ELISA test, but it is more
There is no way to know, without testing, if you are infected with HIV. Learning whether you are HIV positive will help you care for yourself and protect your loved ones.
Why is this test done?
This test is done to
see if you are infected with the virus that causes AIDS. This test is
also used to screen donated blood for HIV.
How do I prepare for this test?
It is important to get counseling before you have the HIV test. This can help to identify things you do that may increase your risk for HIV infection.
How is the test done?
Usually a small
amount of blood is taken from your finger or your arm. Blood from a
finger prick is put in a vial of solution and tested with a dipstick.
Blood taken from your arm with a needle will be sent to a lab for
testing. In some hospitals and clinics a new, faster test is now
available. A sample for testing is obtained by swabbing your gums with
a cotton swab rather than drawing blood.
Having the test
takes just a few minutes of your time. There is no risk of getting
AIDS, hepatitis, or any other blood-borne disease from this test.
Home test kits have
become available through the Internet. However, some of these tests
have been shown to be inaccurate. The only HIV test approved by the FDA is the Home Access HIV
testing kit. When you do this home test, first you register by phone.
Then you collect a sample of blood and mail the sample to the lab for
testing. Toll-free telephone support is available 24 hours a day for
test and result questions. You should see your health care provider to
confirm any positive results from a home test.
How will I get the test result?
Ask your heath care provider when and how you will get the result of your test. Results from the finger-prick or gum-swabbing HIV tests may be available in 30 minutes or less. You may get results from other HIV tests in 2 to 10 days.
The test results are
confidential. Confidential testing ensures that your results will be
guarded with care. Positive results may be reported by name to the
health department for 2 reasons. The first reason is to provide help
with partner notification and referral to care. The second is to
provide reports to the federal government so there can be a count of
how many people have HIV. The count helps determine how much money each state needs for HIV care.
Some centers offer
anonymous testing. Anonymous testing does not use your name at all.
Positive results are reported without any personal identifiers. Some
people feel this better protects the confidentiality and civil rights
of people who test positive for HIV.
What do the test results mean?
In general, a positive HIV test means that you are infected with HIV, and a negative test means that you are not infected with HIV. The test does not directly measure or identify the HIV
virus in the blood, however. Instead it measures antibodies that the
body makes in response to the viral infection. Because it takes at
least a few weeks for the antibodies to appear in the blood after
infection by the virus, it is possible to have a negative test if you
have been recently infected (this is called a false negative test). In
this case, the test will become positive if it isrepeated several
weeks or months later. If you have a negative test result but you are
in a high-risk group, you may need to have another test in 3 to 6
months. Most people test positive 6 weeks after infection.
Although the HIV tests are very precise, sometimes the test result can be positive even though you do not have HIV infection (this is called a false positive test). For this reason, when a positive result occurs, labs perform a second HIV test (Western blot) to check the result.
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