Does this test have other names?
HbsAg, HbcAB IgM, HA AB IgM, Hep C AB; hepatitis B surface antigen; hepatitis B core
antibody IgM; hepatitis A antibody IgM; hepatitis C antibodies
What is this test?
This is a panel of blood tests that looks to see whether you have a hepatitis virus
infection. The tests look for either antibodies that your body has made against a
hepatitis virus or parts of a specific virus.
Hepatitis affects the liver. It is commonly caused by one of several hepatitis viruses.
Hepatitis A, B, and C viruses are especially likely to cause liver damage. These infect
people through different routes and cause varying degrees of liver problems.
Hepatitis A is spread by coming in contact with contaminated stool. You can also catch
it through sexual intercourse, by eating food prepared by an infected person who didn't
wash his or her hands after using the bathroom, from contaminated food or water, or
by putting an object in your mouth that came into contact with an infected person's
stool. This test panel looks for the IgM antibody that your body makes to fight this
virus. Hepatitis A infection usually clears up without treatment after a few weeks.
If your symptoms continue, you need to see your healthcare provider again.
Hepatitis B is spread by coming in contact with infected bodily fluids, including
semen and blood. It can also be spread through sexual intercourse, unsterilized tattoo
equipment, or hypodermic needles. Diagnosis of a current infection is based on the
presence of the IgM antibody to the hepatitis B core antigen (anti-HBc) and a viral
substance called surface antigen (HBsAg). This virus can cause a long-lasting infection.
Hepatitis C is spread by coming in contact with blood from an infected person through
sexual intercourse, unsterilized tattoo equipment, or hypodermic needles. This test
looks for the IgG antibody your body makes to fight the hepatitis C virus. Hepatitis
C infections usually become long-lasting.
Why do I need this test?
You may need this test if your healthcare provider suspects you have hepatitis caused
by a virus. Depending on the type of infection, your symptoms can include:
Yellowing of the skin and eyes (jaundice)
Unusual bleeding and bruising
Swelling in the belly and lower legs
Loss of appetite
Visible blood vessels in the skin
Confusion in extreme cases
What other tests might I have along with this test?
Your healthcare provider may order other tests to help diagnose viral hepatitis. These
may include liver functions tests such as:
Alanine aminotransferase, or ALT
Aspartate aminotransferase, or AST
Gamma-glutamyltransferase, or GGT
Prothrombin time, or PT
Liver function tests look for enzymes in your blood that mean liver problems. They
also test your liver's ability to make certain substances and look at how well your
liver filters your blood.
You may need other tests to look for viral DNA or RNA. Testing for other hepatitis
viruses may also be performed.
What do my test results mean?
Test results may vary depending on your age, gender, health history, the method used
for the test, and other things. Your test results may not mean you have a problem.
Ask your healthcare provider what your test results mean for you.
Test results for these viruses can mean you have:
Hepatitis A. Normal results are negative, meaning you don't have the IgM antibody in your blood.
The antibody shows up 3 to 4 weeks after you are exposed to the virus. The antibody
peaks about a month after symptoms appear, and typically can't be detected 3 to 4
months after symptoms begin. If your test results are positive, it doesn't necessarily
mean you have a current infection. It may mean you had an infection in the past or
it's a false-positive.
Hepatitis B. Normal results are negative, meaning you don't have the HBsAg antigen in your blood. The
HBsAgis usually found if you have either acute or chronic infection. It usually shows
up 2 to 6 weeks after you are exposed to the virus. The antigen peaks shortly before
or after symptoms begin, and typically can't be detected 1 to 3 months after it peaks.
Hepatitis C. Normal results are negative, meaning you don't have the IgG antibody in your blood.
The antibody may peak 6 to 12 months after you are exposed to the virus.
How is this test done?
The test is done with a blood sample. A needle is used to draw blood from a vein in
your arm or hand.
Does this test pose any risks?
Having a blood test with a needle carries some risks. These include bleeding, infection,
bruising, and feeling lightheaded. When the needle pricks your arm or hand, you may
feel a slight sting or pain. Afterward, the site may be sore.
What might affect my test results?
A past infection with hepatitis A can give a false-positive result. This means it
shows you have a current infection even though you do not.
How do I get ready for this test?
You don't need to prepare for this test. But talk with your healthcare provider about
your risk factors for hepatitis infection. Be sure your healthcare provider knows
about all medicines, herbs, vitamins, and supplements you are taking. This includes
medicines that don't need a prescription and any illicit drugs you may use.