HIV - ELISA
This Test is a widely used screening test for detecting antibodies produced in response to Human Immunodeficiency Virus (HIV) infection.
This test works by identifying the body’s immune response to HIV rather than the virus itself. It is commonly used as an initial screening tool due to its high sensitivity and reliability. In some cases, ELISA tests may also detect HIV antigens depending on the generation of the test.
The purpose of this test is to:
- Detect HIV antibodies in the blood
- Screen for HIV infection
- Support early diagnosis of HIV
- Assist in preventive and treatment planning
HIV - ELISA Test Purpose
The HIV – ELISA (Enzyme-Linked Immunosorbent Assay) test is a blood test used for screening for Human Immunodeficiency Virus (HIV) infection. It detects immune markers associated with HIV, depending on the specific assay used. These may include HIV1 and HIV2 antibodies and, in combination assays, the HIV p24 antigen.
The test is commonly used as part of routine HIV screening, sexual health evaluation, and assessment after a potential exposure. Modern laboratory-based HIV antigen/antibody assays can detect infection earlier than antibody-only tests.
A reactive HIV ELISA result does not by itself confirm HIV infection. Additional supplemental or confirmatory testing is required according to the applicable testing algorithm. Conversely, a non-reactive result may be unreliable if testing is performed during the early window period after infection.
HIV - ELISA Test is Recommended for Individuals:
- Individuals undergoing routine HIV screening
- People who may have had a potential exposure to HIV
- Individuals undergoing STI or sexual health screening
- Pregnant women as part of recommended antenatal testing
- People with factors that may increase their risk of HIV exposure
- Individuals undergoing certain medical procedures where HIV screening is required
- Anyone who wants to know their HIV status as part of preventive healthcare
FAQs
1. What does the HIV ELISA test detect?
Depending on the test generation, HIV ELISA may detect HIV antibodies and/or the p24 antigen. It is primarily used as a screening test for HIV infection.
2. Does a positive HIV ELISA result confirm HIV infection?
No. A reactive ELISA result is considered a screening result and requires appropriate supplemental or confirmatory testing before an HIV diagnosis is established.
3. How soon after exposure can HIV ELISA detect infection?
The detection period depends on the specific HIV ELISA assay. Antigen/antibody tests generally detect HIV earlier than antibody-only tests. However, no HIV test can detect infection immediately after exposure. If the exposure was recent, a healthcare professional can advise you on the appropriate test and timing for repeat testing.