Hepatitis B Virus Tests
Test Overview
Hepatitis B tests are blood tests that show whether you have an active hepatitis B, Opens dialog infection. The tests can also show if you had the infection in the past.
The tests look for different signs of infection:
- Antigens, Opens dialog, which are made by bacteria or viruses.
- Antibodies, Opens dialog, which are made by the body to fight infection.
- Hepatitis B DNA, Opens dialog, which is the virus's genetic material.
Hepatitis antibodies can take weeks or months to develop. So an infected person may test negative early in the infection.
You may need testing if:
- You have symptoms of hepatitis.
- You may have been exposed to the hepatitis B virus. You are more likely to have been exposed to the virus if you inject drugs, have many sex partners, or are likely to be exposed to body fluids (such as if you are a health care worker).
- You've had other tests that show you have liver problems.
- You are pregnant.
- You or your doctor wants to know if you are protected from getting the disease.
The tests also are done to help your doctor decide about your treatment and see how well it's working.
When a blood sample is taken, you may feel nothing at all from the needle. Or you might feel a quick sting or pinch.
There is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the site.
Abnormal (positive)
Hepatitis B | Hepatitis B antibodies and/or antigens are found. More tests may be needed to see if you have an acute or chronic infection.
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The test may also find hepatitis D antibodies, which means you have hepatitis D. This infection occurs only in people who are already infected with hepatitis B.
Current as of: April 30, 2024
Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
Current as of: April 30, 2024
Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.