Which marker is not required in HIV viral marker testing?

Which marker is not required in HIV viral marker testing?

• A. HIV-1 p24 antigen
• B. Anti-HIV-1
• C. Anti-HIV-2
• D. Anti-HTLV-I/II

Answer: (A)

In HIV testing, you’re evaluating whether someone has the virus by looking for markers that indicate infection. There are two broad types: viral components and the host’s antibody response. HIV-1 p24 antigen is a viral protein that can show up early, but it isn’t required in every HIV viral marker testing strategy. Many screening approaches rely primarily on detecting antibodies to HIV-1 and HIV-2, with p24 antigen included only in certain assays (such as 4th‑generation tests) to shorten the window period. Therefore, the HIV-1 p24 antigen is the marker not required in standard HIV viral marker testing. Anti-HIV-1 and anti-HIV-2 are core antibody markers for identifying infection, and Anti-HTLV-I/II is a marker for a different retrovirus, not part of HIV viral marker testing.

In HIV testing, you’re evaluating whether someone has the virus by looking for markers that indicate infection. There are two broad types: viral components and the host’s antibody response. HIV-1 p24 antigen is a viral protein that can show up early, but it isn’t required in every HIV viral marker testing strategy. Many screening approaches rely primarily on detecting antibodies to HIV-1 and HIV-2, with p24 antigen included only in certain assays (such as 4th‑generation tests) to shorten the window period. Therefore, the HIV-1 p24 antigen is the marker not required in standard HIV viral marker testing. Anti-HIV-1 and anti-HIV-2 are core antibody markers for identifying infection, and Anti-HTLV-I/II is a marker for a different retrovirus, not part of HIV viral marker testing.