Hepatitis B Virus Core IgM Antibody (HBc IgM) Test
About Hepatitis B Virus Core IgM Antibody (HBc IgM) Test
| Field | Value |
|---|---|
| Also Known As | IgM anti-HBc, Anti-HBc IgM, HBcAb IgM, Hepatitis B Core antibody (IgM), Hepatitis B Core IgM Specific antibody |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting required |
| Report Time | 1 to 2 days |
| Recommended For | Adults and children of all ages showing symptoms of hepatitis or with risk factors for HBV exposure |
| Price | Starting at ₹415 |
What is a Hepatitis B Virus Core IgM Antibody (HBc IgM) Test?
The Hepatitis B Virus core IgM antibody (HBc IgM) test detects a specific type of antibody that the immune system produces in the early weeks of a hepatitis B virus (HBV) infection. A blood sample is drawn from a vein in the arm and tested in a laboratory. Doctors prescribe this test when they suspect a recent or acute hepatitis B infection. It is also known by several alternate names, including IgM anti-HBc, anti-HBc IgM, and HBcAb IgM.
What Does a Hepatitis B Virus Core IgM Antibody (HBc IgM) Test Measure?
This test looks for one specific marker in the blood. The table below explains what is measured and why it matters.
| Parameter | What It Means |
|---|---|
| Anti-HBc IgM (IgM antibodies against hepatitis B core antigen) | These antibodies appear within weeks of an acute HBV infection. Their presence suggests a recent or active infection. They are usually detectable for up to 6 months after the infection begins. |
The Hepatitis B Core antibody (IgM) is particularly useful because it can be the only detectable marker during the "window period", when other hepatitis B markers may not yet show up in blood tests.
Why is a Hepatitis B Virus Core IgM Antibody (HBc IgM) Test Done?
A doctor may order this test for several reasons, from investigating unexplained symptoms to clarifying results from other hepatitis B tests.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to request this test:
- Unusual tiredness and fatigue
- Fever
- Loss of appetite or nausea
- Vomiting and upset stomach
- Dark-coloured urine or pale, grey-coloured stools
- Joint pain
- Yellowing of the skin and eyes (jaundice)
Conditions This Test Can Help Detect
This test can help identify several conditions. These include:
- Acute (recent) hepatitis B virus infection
- Hepatitis B infection during the serological window period, when the surface antigen (HBsAg) and surface antibody results are both negative
- Whether an infection is acute, past, or a flare-up of a chronic infection, when total hepatitis B core antibodies are already known to be positive
- An acute exacerbation (sudden worsening or liver flare) in a person with a chronic HBV infection
How to Prepare and What to Expect
Preparing for this test is straightforward. The steps below cover everything you need to know before your appointment.
Do You Need to Fast?
No, fasting is not required for this test. You can eat and drink as normal before your sample is collected. However, if your doctor has ordered additional tests at the same time, check whether those require fasting.
Practical Tips Before Your Test
A few simple steps will help ensure an accurate result:
- Avoid high-dose biotin (vitamin B7) supplements for at least 12 hours before the test, as high biotin levels can interfere with certain laboratory methods
- Tell your doctor about all medications, supplements, or known liver conditions
- Drink enough water to stay well hydrated before the test
- Wear a short-sleeved or loose-fitting top for easy access to the arm
Step-by-Step Procedure
Here is what to expect on the day of your test:
- A trained phlebotomist (blood collection professional) will clean the skin over a vein, usually on the inside of your elbow.
- A tourniquet (a soft band) is wrapped around the upper arm to make the vein easier to see.
- A sterile needle is gently inserted into the vein to draw a small blood sample into a collection tube.
- Once enough blood is collected, the needle is removed, and light pressure is applied to stop any bleeding.
- The collection tube is labelled and processed promptly, typically centrifuged within 2 hours of collection.
- The sample is dispatched to the laboratory for analysis.
Factors That Can Affect Accuracy
Certain factors may influence how reliable the result is:
- Taking high-dose biotin supplements close to the test
- Haemolysed samples (where red blood cells have broken down)
- Lipaemic samples (very fatty blood, often after a high-fat meal)
- Very high bilirubin levels (icteric samples)
- Being immunosuppressed or immunocompromised at the time of testing
- In rare cases, interference from very high levels of certain antibodies present in the blood
Understanding Your Hepatitis B Virus Core IgM Antibody (HBc IgM) Test Results
Results from this test are reported as either reactive (positive) or non-reactive (negative). The table below shows the reference range used by most laboratories.
| Parameter | Result | Interpretation |
|---|---|---|
| Anti-HBc IgM | Negative (Non-reactive) | Normal; no IgM antibodies detected |
| Anti-HBc IgM | Positive (Reactive) | IgM antibodies detected; may indicate a recent or acute HBV infection |
A result below a signal-to-cutoff ratio of 0.90 is generally considered negative. A result above 1.10 is considered positive. Values between these cut-offs may be considered borderline, and the laboratory or doctor may recommend repeat testing.
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
Some circumstances can affect how results are interpreted:
People undergoing cancer treatment, therapy for rheumatological diseases, or other immunosuppressive treatments may be at risk of hepatitis B reactivation, and testing for both HBsAg and anti-HBc is recommended before starting such therapies. In patients with chronic HBV infection, anti-HBc IgM may remain detectable at low levels or appear intermittently, which can complicate interpretation.
How to Maintain Healthy Levels
These general wellness steps can help reduce the risk of hepatitis B exposure:
- Get vaccinated against hepatitis B. The vaccine is safe and effective and is usually given as a series of three or four shots.
- Avoid sharing needles, syringes, or personal items such as razors that may come into contact with blood.
- Practise safe and hygienic behaviours to avoid exposure to infected blood or body fluids.
Lupin Diagnostics Hepatitis B Virus Core IgM Antibody (HBc IgM) Test Price and Home Collection
The Hepatitis B Virus core IgM antibody (HBc IgM) test is available at Lupin Diagnostics with home sample collection across major cities. Prices below are sourced from aggregator platforms and are indicative.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹830 |
| Bengaluru | ₹830 |
| Chennai | ₹830 |
| Hyderabad | ₹830 |
| Kolkata | ₹830 |
| Pune | ₹830 |
| Ahmedabad | ₹830 |
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 the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home sample collection for this test across cities in India. All samples are processed in NABL-accredited laboratories, ensuring accurate and reliable results. Digital reports are delivered conveniently via email or WhatsApp.
Frequently Asked Questions
The HBcAb IgM test is primarily used to diagnose a recent or acute hepatitis B infection. It can also help detect hepatitis B during the window period when other viral markers may not be detectable and assists in distinguishing acute infection from chronic or past infection.
The total anti-HBc test measures both IgM and IgG antibodies, whereas the HBc IgM test measures only IgM antibodies. IgM antibodies generally disappear within six months of infection, while IgG antibodies remain for life. A positive total anti-HBc result with a negative IgM result usually indicates a past or chronic infection rather than a recent infection.
The window period is the phase of hepatitis B infection when hepatitis B surface antigen (HBsAg) is no longer detectable but protective surface antibodies (anti-HBs) have not yet appeared. During this period, anti-HBc IgM may be the only detectable marker of recent infection, making this test especially important.
No. The HBc IgM test cannot determine immunity from hepatitis B vaccination because the vaccine contains only hepatitis B surface antigen and does not trigger production of core antibodies. An anti-HBs antibody test is used to assess vaccine-induced immunity.
No fasting is required before the HBc IgM test. You can eat and drink normally. However, high-dose biotin supplements should generally be avoided for at least 12 hours before sample collection, as they may interfere with certain laboratory assays.
After acute hepatitis B infection, IgM anti-HBc antibodies typically become detectable about 1 to 3 weeks after hepatitis B surface antigen first appears in the blood. These antibodies usually remain detectable for up to six months before gradually declining.
Yes. Although HBc IgM is mainly associated with acute hepatitis B infection, it may also be detected at lower levels in individuals with chronic hepatitis B during periods of viral reactivation or disease flare. Your doctor will interpret the result alongside other laboratory findings and clinical information.
Hepatitis B Virus Core IgM Antibody (HBc IgM) Test: Booking, Price, and Results
