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Hepatitis B Core Antibody, Donor-Specific (Serum/Plasma)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to the hepatitis B core antigen, which your immune system produces after exposure to the hepatitis B virus. It helps determine if you’ve been infected or vaccinated.

Quick summary

["This test checks for past or potential hepatitis B exposure, not active infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47440-3
Short code
HBV core Ab Ser Donr Ql
Synonyms
HBV core Ab Ser Donr Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for specific antibodies (IgM and IgG) against the hepatitis B core antigen. IgM antibodies typically appear shortly after infection and can indicate an acute (recent) infection. IgG antibodies may persist longer and suggest past infection or immunity.

Why It Matters in Your Care

Knowing your hepatitis B core antibody status helps doctors assess your risk for hepatitis B infection, guide vaccination decisions, or monitor immunity after vaccination or recovery from infection.

How the Test Works

A small blood sample is drawn and tested using an immunoassay method to detect the presence of antibodies. The result is qualitative (yes/no) rather than a numeric value.

What to Expect Before the Test

No special preparation is needed. You may have a slight pinch when the blood is drawn, but it usually doesn’t cause discomfort. Wear short sleeves for easy access.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Understanding Results

Short name

Hep B Core Antibody (Qualitative)

Frequently asked questions

Positive IgM antibodies alone may indicate recent infection; IgG alone suggests past infection or immunity. A combination of IgM and IgG may indicate a chronic infection. Always consult your healthcare provider for interpretation.
This test alone cannot confirm active hepatitis B virus replication. If you’re unsure about your status or symptoms, ask your doctor to check for hepatitis B surface antibodies (HBsAb) or viral load testing if needed.
Can I get this test if I’ve never been vaccinated or exposed to hepatitis B?
Yes, this test can be performed regardless of vaccination history. It helps determine if you’ve had prior exposure, even if you don’t remember it.
What if my test result is positive but I don’t have symptoms?
A positive result could mean past infection or immunity. If you’re asymptomatic, your doctor may recommend follow-up testing (like HBsAb or viral load) to assess your risk or need for prevention strategies.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy