Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test: Booking, Price, and Results
About Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test
| Field | Value |
|---|---|
| Also Known As | HBsAg Test, Australia Antigen Test, Hepatitis B Surface Antigen Test, HBsAg CLIA, HBsAg ELISA |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting needed |
| Report Time | Within 3 days |
| Recommended For | All adults; pregnant women; healthcare workers; individuals with high-risk exposure |
| Price | Starting at ₹144 |
What Is a Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test?
The HBsAg CLIA/ELISA test is a blood test that checks for the presence of the hepatitis B surface antigen, a protein found on the outer coat of the hepatitis B virus (HBV). A positive result indicates that the virus is currently active in the body. Also called the Australia Antigen Test, this test is commonly prescribed for routine screening, pre-surgical workups, and antenatal care. A small sample of venous blood (serum) is collected from a vein in the arm.
What Does a Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test Measure?
The HBsAg ELISA test and HBsAg CLIA method both detect a single key marker in the blood. The table below explains what is measured and why it matters.
| Parameter | What It Is | Why It Matters |
|---|---|---|
| Hepatitis B Surface Antigen (HBsAg) | A protein on the surface of the hepatitis B virus | The first marker to appear in the blood after HBV infection; its presence confirms active infection |
Two laboratory methods are used to detect this antigen. ELISA (Enzyme-Linked Immunosorbent Assay) uses enzyme-based reactions to identify the antigen. CLIA (Chemiluminescent Immunoassay) uses light-emitting reactions and generally offers higher sensitivity and automated processing. Both are widely accepted and reliable methods.
Why Is a Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test Done?
A doctor may order this test when certain symptoms are present, as part of routine screening or to monitor a known condition. The sections below cover the most common reasons.
Common Symptoms That May Require This Test
Your doctor may recommend an HBsAg CLIA blood test if you experience any of the following:
- Unexplained fatigue or persistent tiredness
- Loss of appetite or nausea with or without vomiting
- Abdominal pain, particularly in the upper right area
- Dark-coloured urine
- Clay or pale-coloured bowel movements
- Joint pain without a clear cause
- Jaundice (yellowing of the skin or whites of the eyes)
Conditions This Test Can Help Detect
The Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA test can help identify the following conditions:
- Acute hepatitis B infection (a recent, active infection)
- Chronic hepatitis B infection (infection persisting beyond 6 months)
- Carrier state (a person carrying the virus without obvious symptoms but able to transmit it)
- Cirrhosis risk assessment (scarring of the liver linked to long-term HBV infection)
- Hepatocellular carcinoma risk (chronic HBV infection is associated with a significantly elevated risk of liver cancer)
Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test During Pregnancy
All pregnant women are advised to undergo HBsAg ELISA or CLIA screening during the first trimester of each pregnancy, even if they have been vaccinated or tested before. This is because HBV infection during pregnancy can pose serious risks to the newborn. Infants born to mothers with active HBV infection have a very high chance of developing chronic hepatitis B if not managed promptly after birth.
Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test for Chronic Disease Monitoring
For individuals already diagnosed with chronic hepatitis B, the HBsAg CLIA test is used alongside other markers to track how the infection is progressing and how well treatment is working. Monitoring is typically recommended every 3 to 6 months during the first year after diagnosis. Loss of HBsAg over time is one of the key indicators of a positive treatment response.
How to Prepare and What to Expect
No special preparation is needed for this test. The process is quick and straightforward.
Do You Need to Fast?
No, fasting is not required before the HBsAg CLIA/ELISA test. Hepatitis B is transmitted through blood and is not influenced by food intake, so you can eat and drink normally before your appointment. If your doctor has ordered additional tests alongside this one, check whether any of those require fasting.
Practical Tips Before Your Test
A few simple steps can help ensure a smooth sample collection experience:
- Inform your doctor or technician about all current medications, especially those related to liver conditions
- Stop taking high-dose biotin supplements (vitamin B7) at least 72 hours before sample collection, as they may interfere with results
- Stay well hydrated before your appointment
- Wear a short-sleeved or loose-fitting top for easy access to your arm
Step-by-Step Procedure
Here is what to expect during the blood collection process:
- A trained phlebotomist will clean the inside of your arm with an antiseptic wipe.
- An elastic band (tourniquet) is tied around your upper arm to make the veins more visible.
- A small needle is gently inserted into a vein, usually in the inner elbow area, and a small amount of blood is drawn.
- The needle is removed, and gentle pressure is applied to the puncture site.
- A small bandage is placed over the area to prevent any minor bleeding.
- The blood sample is labelled and sent to the laboratory for analysis.
Factors That Can Affect Accuracy
Several factors may influence the accuracy of your Australia Antigen Test result:
- Recent hepatitis B vaccination (may produce a temporary positive reading for up to 14 days)
- High-dose biotin supplementation (more than 5 mg daily)
- Immunosuppressive medications, which may affect antigen levels
- Severely haemolysed (damaged) blood specimens
- Improper sample storage or handling after collection
Understanding Your Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test Results
Results for this test are reported as either reactive (positive) or non-reactive (negative). Always review your results with a qualified doctor who can interpret them in the context of your medical history.
| Parameter | Result | Interpretation |
|---|---|---|
| HBsAg (Qualitative) | Non-reactive/Negative | No hepatitis B surface antigen detected; no current HBV infection |
| HBsAg (Qualitative) | Reactive/Positive | HBsAg detected; active HBV infection is present |
| HBsAg (Signal/Cutoff ratio) | Less than 1 s/c | Negative |
| HBsAg (Signal/Cutoff ratio) | 1 to 5 s/c | Indeterminate; repeat testing is recommended |
| HBsAg (Signal/Cutoff ratio) | More than 5 s/c | Positive |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can affect how results are interpreted:
- Recent hepatitis B vaccination, particularly in newborns and young children, may cause a temporary positive HBsAg result due to the relatively large antigen dose in the vaccine. This effect generally resolves within 14 days.
- Immunosuppressed patients, such as those receiving B-cell depleting therapies, face a higher risk of HBV reactivation. Those with a history of HBV infection should be assessed carefully before and during such treatments.
How to Maintain Healthy Levels
The following general wellness steps support liver health and reduce the risk of HBV transmission:
- Complete the full hepatitis B vaccination series if you have not already done so
- Practise safe behaviour, including protected sexual contact and avoiding the sharing of needles, razors, or other personal items
- Limit alcohol intake, as excessive consumption places additional strain on the liver
Lupin Diagnostics Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test Price and Home Collection
The HBsAg CLIA/ELISA test is available at Lupin Diagnostics centres across India, with prices starting at ₹144. Home sample collection is also available in select cities for added convenience. Approximate prices across major cities are listed below:
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹550 |
| Bengaluru | ₹1350 |
| Chennai | ₹1350 |
| Hyderabad | ₹1350 |
| Kolkata | ₹800 |
| Pune | ₹550 |
| Ahmedabad | ₹550 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within 3 days.
Home Collection
Lupin Diagnostics offers home sample collection for the HBsAg ELISA test across multiple cities, so you can get tested from the comfort of your home. All samples are processed in NABL-accredited laboratories by experienced technologists. Digital reports are delivered directly to your email or WhatsApp once ready.
Frequently Asked Questions
The HBsAg CLIA/ELISA test checks whether the hepatitis B surface antigen is present in your blood. A positive result confirms that the hepatitis B virus is currently active in your body and that you can potentially pass it to others. It is used for routine screening, pre-operative assessments, antenatal checks, and monitoring of known HBV infections.
No fasting is required before this test. You can eat and drink normally on the day of your appointment. If your doctor has also ordered other blood tests that require fasting, check with them before eating.
The Australia Antigen Test can detect HBsAg as early as 1 week after exposure, though the average detection window is around 1 month. In general, the antigen becomes detectable between 4 and 10 weeks after exposure to HBV. If you suspect a recent exposure, speak to your doctor about the best time to test.
A reactive or positive result means the hepatitis B surface antigen was found in your blood, indicating an active infection. Most adults who contract HBV clear the virus within a few months. If HBsAg remains positive for more than 6 months, the infection is considered chronic. Your doctor will advise on the next steps based on your overall results.
Screening for HBsAg during pregnancy helps identify mothers with active HBV infection, allowing timely protective measures for their newborns. Without intervention, infants born to HBsAg-positive mothers have a very high chance of developing chronic HBV infection. Early detection during the first trimester allows doctors to plan appropriate care at and after delivery.
Both the HBsAg ELISA test and CLIA are immunoassay techniques that detect the hepatitis B surface antigen in a blood sample. ELISA uses enzyme-based chemical reactions to produce a measurable signal. CLIA uses light-emitting reactions and generally provides higher sensitivity along with automated processing. Both methods are clinically accepted for HBsAg detection.
Yes, a recent hepatitis B vaccination can temporarily cause a positive HBsAg CLIA blood result, particularly in newborns and individuals with low body mass relative to the vaccine dose. This effect typically resolves within 14 days of vaccination. If you have been recently vaccinated and receive a weakly positive result, your doctor may recommend a confirmatory test.
Hepatitis B Surface Antigen (HBsAg), CLIA/ELISA Test
