Hepatitis B Surface Antigen (HBsAg)
The presence of HBsAg is indicative of acute or chronic hepatitis B infection. Approximately 5% to 10% of adults with acute hepatitis B infection develop a chronic HBsAg carrier state.
Hepatitis B Surface Antibody (HBsAb)
Reported as non-reactive or reactive. All reactive cases are measured. The antibody level being reported in the range 0 to > 1000mIU/L indicates convalescence or recovery from acute hepatitis B. After vaccination, a level of greater than 12.5 mIU/L is considered to offer a significant level of immunity.
Hepatitis A Total Antibodies (Anti-HAV Total)
This test detects both IgM and IgG antibodies. The presence of anti-HAV is indicative of past or present infection with hepatitis A virus (HAV) or vaccination against HAV. This test becomes reactive during the acute phase (1gM) of the infection and then usually remains positive for years after the infection (IgG).