Hepatitis B Surface Antigen (HBsAg)
Also called: HBsAg, Australia Antigen, Hep B Test
Screens for hepatitis B infection — required before surgery, pregnancy, and many jobs.
- Duration
- 5 min
- Report
- Same day
- Sample
- Blood
- Fasting
- Not needed
What this test is
HBsAg is a protein on the surface of the hepatitis B virus. A positive test means active infection — either acute (recent) or chronic. India has a 3–4% prevalence of chronic hepatitis B, often discovered incidentally on pre-marriage or pre-employment screening. Most chronic infections are silent for decades but can lead to liver cirrhosis and cancer if untreated.
When you need this test
- Pre-marriage screening
- Pregnancy
- Pre-surgery or pre-dental procedure
- Healthcare worker employment medicals
- After possible blood/needle exposure
How to prepare
- No fasting required.
- Bring any previous hepatitis B test or vaccination records.
- Tell us if you have been vaccinated against hepatitis B — vaccination does not cause a positive HBsAg.
Why DiagnoHouse for this test
NABL-accredited lab
Quality-audited blood, urine, and stool analysis.
Home collection
Free across Pimpri-Chinchwad. Sample picked up at your time slot.
Same-day reports
Most pathology reports ready within 4 hours of collection.
Calibrated equipment
Analysers calibrated daily; quality controls run with every batch.
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FAQs
What does a positive HBsAg mean?
Active hepatitis B infection. We follow up with additional tests (HBeAg, HBV DNA, LFT) to assess whether it is acute or chronic and how active.Is hepatitis B curable?
Acute hepatitis B usually clears on its own. Chronic infection can be controlled with antiviral medication, often lifelong. Vaccination remains the best protection.Will vaccination show up as positive?
No — the vaccine creates antibodies (anti-HBs), not the surface antigen. HBsAg remains negative.
Need help choosing?
Not sure if this is the right test for you? Have a doctor's note? Call or WhatsApp — guidance is free.
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