What is HIV-1 and 2 antibody test?
HIV is a viral infection that attacks the immune system. This test is done to diagnose HIV infection by detecting the HIV-1 and HIV-2 antibodies in the blood. This is not a screening test as this test does not detect an HIV infection soon after exposure.
What does the HIV-1/2 Ag AB immunoassay test identify?
The Determine HIV–1/2 Ag/Ab Combo is an in vitro, visually read, qualitative immunoassay for the simultaneous detection of Human Immunodefciency Virus Type 1 (HIV-1) p24 antigen (Ag) and antibodies (Ab) to HIV Type 1 and Type 2 (HIV-1 and HIV-2) in human serum, plasma, capillary (fngerstick) whole blood or venipuncture …
What is HIV p24 Ag?
An antigen test checks your blood for an HIV antigen, called p24. When you’re first infected with HIV, and before your body has a chance to make antibodies to the virus, your blood has a high level of p24. The p24 antigen test is accurate 11 days to 1 month after getting infected.
What does HIV-1 AB positive mean?
A positive HIV antibody test means that the body has been exposed to HIV (and the body has produced antibodies in response to this exposure). A person with a positive HIV test will need to have further testing done to confirm this diagnosis.
When does p24 antigen become detectable?
p24 (short for protein 24) is produced 2–3 weeks after infection and before antibodies are produced. p24 levels are only detectable for the next 1–2 months. However, by the time the p24 levels have dropped antibodies will be present.
How long p24 antigen will be positive?
How reliable is p24 antigen test?
Antibodies to p24 are produced during seroconversion, rendering p24 antigen undetectable after seroconversion in most cases. Therefore, p24 antigen assays are not reliable for diagnosing HIV infection after its very earliest stages.
How accurate is the p24 antigen test?
What is the meaning of p24?
In these tests the antigen being tested is a major HIV protein called p24. p24 (short for protein 24) is produced 2–3 weeks after infection and before antibodies are produced. p24 levels are only detectable for the next 1–2 months.
What is the p24 antigen used to diagnose HIV?
It detects the HIV antigen called p24 plus antibodies to HIV-1 and HIV-2. (HIV-1 is the most common type found in the United States, while HIV-2 has a higher prevalence in parts of Africa.) The level of p24 antigen and the amount of virus (viral load) increase significantly soon after initial infection.
What is Alere determine HIV–1/2 AG/AB combo?
Indications: Alere Determine HIV–1/2 Ag/Ab Combo is an in vitro, visually read, rapid qualitative immunoassay for the simultaneous detection of HIV-1 p24 antigen and antibodies to both HIV-1 and HIV-2 in human serum, plasma, capillary (fingerstick) whole blood or venipuncture (venous) whole blood.
What is the Abbott architect HIV AG/AB combo assay?
The Abbott Architect HIV Ag/Ab Combo assay for use on the Architect i System is a 2-step immunoassay to determine the presence of HIV-1 p24 antigen, antibodies to HIV-1 (groups M and O), and antibodies to HIV-2 in human serum or plasma using chemiluminescent microparticle immunoassay technology.
What is a reactive HIV-1/-2 antigen test?
Reactive HIV-1/-2 antigen and antibody screening test results suggest the presence of HIV-1 and/or HIV-2 infection, but it is not diagnostic for HIV infection and should be considered preliminary. A reactive result does not differentiate among reactivity with HIV-1 p24 antigen, HIV-1 antibody, and HIV-2 antibody.