Antibody Titration for Hepatitis B Surface Antigen (IgG)
This test measures the strength of your immune response to the hepatitis B virus by detecting specific antibodies in your blood. It helps determine if you’ve been exposed to the virus or if your immune system is actively fighting it.
["This test helps assess past or current hepatitis B infection and immune response."]
Key facts at a glance
- LOINC
- 34318-6
- Short code
- HTLV I+II Ab Titr Ser CF
- Synonyms
- HTLV I+II Ab Titr Ser CF
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- comp-fix
- 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
Why This Test Matters
Hepatitis B is a serious liver infection caused by the hepatitis B virus (HBV). Your body produces antibodies in response to HBV infection, and this test measures how strong those antibodies are. Strong antibody levels may indicate immunity from past infection or vaccination.
What to Expect Before the Test
No special preparation is needed. A blood sample will be drawn from a vein in your arm by a healthcare professional. You may feel slight discomfort, but it usually lasts only a few minutes.
How the Results Are Used
Your healthcare provider will use these results to determine if you have immunity to hepatitis B, whether you’ve been exposed to the virus, or if you need further testing or treatment.
Common Causes of Testing
This test is often ordered if you have risk factors for hepatitis B (e.g., travel to regions with high HBV prevalence, sexual history, or exposure to infected blood), if you’re vaccinated but want to confirm immunity, or if you have unexplained liver issues.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High antibody titers (strong response) may indicate immunity from vaccination or prior infection. Low or absent titers could mean you’re not immune and may need vaccination or monitoring. This test is critical for public health surveillance, vaccination programs, and managing chronic hepatitis B.
Short name
Hepatitis B Antibody Titration
Frequently asked questions
How long does it take to get results?
What does a positive result mean?
Can I get this test at home?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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