THIS TEST USES AN ENZYME-LINKED IMMUNOSORBENT ASSAY (ELISA) TO DETECT ANTIBODIES TO THE HEPATITIS C VIRUS IN THE BLOOD.

THIS TEST USES AN ENZYME-LINKED IMMUNOSORBENT ASSAY (ELISA) TO SCREEN FOR ANTIBODIES TO HIV-1 AND HIV-2. THE PRESENCE OF THESE ANTIBODIES INDICATES A PAST OR PRESENT INFECTION WITH HIV. A POSITIVE RESULT REQUIRES CONFIRMATION WITH A MORE SPECIFIC TEST, AS THIS IS A SCREENING METHOD.

THIS TEST DETECTS THE HEPATITIS B SURFACE ANTIGEN (HBSAG) IN THE BLOOD. THE PRESENCE OF HBSAG INDICATES AN ACTIVE INFECTION WITH THE HEPATITIS B VIRUS. IT CAN BE A NEW, ACUTE INFECTION OR A CHRONIC INFECTION.