Result Interpretation

Nonreactive: Hepatitis B surface antigen was not detected. This does not exclude the possibility of exposure to, or infection with Hepatitis B Virus.

Reactive: This test is intended as a screen only. A reactive result indicates presumptive evidence of infection with HBV. The specimen will be forwarded to Mayo Medical Laboratories for confirmatory testing. 
Specimens with reactive screen results but negative (ie, not confirmed) HBsAg confirmatory test results are likely to contain cross-reactive antibodies from other infectious or immunologic disorders. Repeat testing is recommended at a later date if clinically indicated.