Hepatitis A Virus Test
Test Overview
The hepatitis A virus test is a blood test that shows if you have a hepatitis A, Opens dialog infection now or had it in the past.
The test looks for antibodies, Opens dialog made by the body to fight the virus. They will be in your blood if you have a hepatitis A infection now or have had one in the past.
- Hepatitis A IgM antibodies.
These can be found as early as 2 weeks after you are first infected. They disappear 3 to 12 months after the infection.
- Hepatitis A IgG antibodies.
These appear 8 to 12 weeks after you are first infected. They stay in your blood and protect you from hepatitis A permanently.
You may need these tests if:
- You have symptoms of hepatitis.
- You may have been exposed to the hepatitis A virus. You have a greater chance of being exposed to the virus if you have been to a country where the disease is common, you work in a day care center, or you live with someone who has the disease.
- You've had other tests that show you have liver problems.
- You or your doctor wants to know if you are protected from getting the disease.
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.
The test looks for antibodies, Opens dialog made by the body to fight the virus. They will be in your blood if you have a hepatitis A infection now or have had one in the past.
If you are tested soon after you were infected with hepatitis A, the test may show that you don't have the disease even when you have it. This is because hepatitis A antibodies can take weeks to develop. They may not be in your blood yet.
Negative: | No hepatitis A virus antibodies are found. |
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Positive: | Hepatitis A antibodies are found. You may need more tests to find out if you have an active infection now or a past infection that got better.
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Current as of: April 30, 2024
Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Ignite Healthwise, LLC 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 Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
