HBsAg (Hepatitis B Surface Antigen) is a blood test used to detect active Hepatitis B infection. Presence of HBsAg indicates the virus is currently in the body, either in acute or chronic form.
This test is crucial for blood screening, pregnancy testing, pre-surgical clearance, and evaluating liver disease.
Why Is This Test Recommended?Screening for Hepatitis B infection
Pre-employment or blood donation testing
Pregnancy screening
Liver disease evaluation
Understanding HBsAgA positive result means the virus is present and contagious. A negative result suggests no active infection. Further tests are needed to determine disease stage.
Who Should Get Tested?Healthcare workers
Pregnant women
People with liver symptoms
Individuals with risky exposure
Preparation
No fasting required
Inform doctor about vaccination status
Results Interpretation
Negative: No active infection
Positive: Active Hepatitis B (needs further evaluation)
FAQs
Is HBsAg the same as Hepatitis B antibody? – No.
Does positive mean liver damage? – Not always.
Is it contagious? – Yes.
Can vaccination affect results? – No.
Is confirmatory testing needed? – Yes.
