What is the primary purpose of the Hep B Sur AB test?

The primary purpose of the Hepatitis B Surface Antibody (Hep B Sur AB) test is to assess immunity status. This test measures the presence of antibodies to the hepatitis B surface antigen (HBsAg) in the blood, which indicates whether a person has developed immunity to the hepatitis B virus (HBV), typically after vaccination or recovery from a past infection. A positive result shows that an individual is likely protected against HBV and can help determine their readiness for potential exposure to the virus.

Assessing immunity status is crucial for managing the health of patients, especially those at risk for HBV infection, or those who may need to receive the vaccine. This information assists healthcare providers in making more informed decisions regarding vaccination and preventive measures for patients.

Other options, while relevant to hepatitis B testing, do not pertain to the specific purpose of this test. Checking for active infection usually involves measuring hepatitis B surface antigen (HBsAg) or assessing the presence of liver enzymes relates to liver function tests, which are distinct from evaluating immunity. Similarly, detecting IgM antibodies typically refers to testing for acute infections rather than immunity.