Which antibody does the Hep A AB IGM test detect?

The Hep A AB IGM test is specifically designed to detect IgM antibodies. Testing for IgM is crucial because the presence of these antibodies indicates a recent or current infection with the hepatitis A virus. This is important for diagnosing acute hepatitis A infections, as IgM antibodies typically appear in the bloodstream shortly after infection, usually within two weeks.

The other types of antibodies mentioned are not relevant to this particular test. IgG antibodies indicate past infections and provide immunity, IgA antibodies are primarily found in mucosal areas, and IgE antibodies are associated with allergic reactions. Therefore, the detection of IgM is essential for identifying active infections and ensuring appropriate medical intervention.