What test is often used to screen for HIV antibodies?

The test commonly used to screen for HIV antibodies is the ELISA (Enzyme-Linked Immunosorbent Assay). The ELISA tests for the presence of antibodies against HIV in the blood, making it a crucial initial screening tool. This method is highly sensitive and can detect antibodies within a few weeks after exposure to the virus, which is essential for early diagnosis and timely treatment.

While the Western blot is a confirmatory test typically used to verify the results of an initial positive ELISA test, it is not primarily used for screening. CD4 count is important in monitoring the immune status of individuals already diagnosed with HIV but does not detect the virus or antibodies. The Monospot test is designed to detect heterophile antibodies associated with infectious mononucleosis and is not related to HIV testing. Therefore, among the options listed, the ELISA stands out as the standard screening method for HIV antibodies.