Overview
Hepatitis B screening uses blood tests to detect surface antigen, antibodies and sometimes other markers. Results help determine infection, immunity or need for vaccination.
What it detects
Hepatitis B surface antigen, surface antibody and related markers.
Sample type
Blood sample.
When it may be appropriate
Routine screening, pregnancy, partner diagnosis or vaccination decisions.
Window period considerations
Markers appear at different times after exposure; timing affects interpretation.
Test limitations
Window periods and assay variation can affect early detection.
Interpretation basics
Results indicate acute infection, chronic infection, immunity or susceptibility.
Follow-up recommendations
Vaccinate if susceptible, monitor if infected, and assess liver status if chronic.
Key points
- Detects infection and immunity
- Blood-based test
- Guides vaccination
- Chronic infection needs monitoring
When to seek care
- Routine screening
- Partner diagnosis
- Pregnancy
- Before vaccination