Hepatitis A antibody test; Hepatitis B antibody test; Hepatitis C antibody test; Hepatitis D antibody test
The hepatitis virus panel is a series of blood tests used to detect current or past infection by hepatitis A, hepatitis B, or hepatitis C. It can screen blood samples for more than one kind of hepatitis virus at the same time.
Antibody and antigen tests can detect each of the different hepatitis viruses.
Note: Hepatitis D only causes disease in people who also have hepatitis B. It is not routinely checked on a hepatitis antibody panel.
How the Test is Performed
Blood is most often drawn from a vein the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the provider gently inserts a needle into the vein. The blood collects into an airtight tube attached to the needle. The elastic band is removed from your arm. Once the blood has been collected, the needle is removed. The puncture site is covered to stop any bleeding.
In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube, or onto a slide or test strip. A bandage may be placed over the area if there is any bleeding.
The blood sample is sent to a lab to be examined. Blood (serology) tests are used to check for antibodies to each of the hepatitis viruses.
How to Prepare for the Test
No special preparation is needed.
How the Test Will Feel
Some people feel moderate pain when the needle is inserted to draw blood. Others feel only a prick or stinging sensation. Afterward, you may feel some throbbing.
Why the Test is Performed
Your provider may order this test if you have signs of hepatitis. It is used to:
- Detect current or previous hepatitis infection
- Determine how contagious a person with hepatitis is
- Monitor a person who is being treated for hepatitis
The test may be performed for other conditions, such as:
- Chronic persistent hepatitis
- Delta agent (hepatitis D)
- Nephrotic syndrome
Normal Results
A normal result means no hepatitis antibodies are found in the blood sample. This is called a negative result.
Normal value ranges may vary slightly depending on the lab doing the test. Talk to your provider about the meaning of your specific test results.
What Abnormal Results Mean
There are different tests for hepatitis A and B. A positive test is considered abnormal.
A positive test may mean:
- You currently have a hepatitis infection. This may be a new infection (acute hepatitis), or it may be an infection that you have had for a long time ( chronic hepatitis).
- You had a hepatitis infection in the past, but you no longer have the infection and cannot spread it to others.
Hepatitis A test results:
- IgM anti-hepatitis A virus (HAV) antibodies, you have had a recent infection with hepatitis A
- Total (IgM and IgG) antibodies to hepatitis A, you have a previous or past infection, or immunity to hepatitis A
Hepatitis B tests:
- Hepatitis B surface antigen (HBsAg), you have an active hepatitis B infection, either recent or chronic
- Antibody to hepatitis B core antigen (Anti-HBc), you have a recent or past hepatitis B infection
- Antibody to HBsAg (Anti-HBs), you have a past hepatitis B infection or you have received the hepatitis B vaccine and are unlikely to become infected
- Hepatitis B type e antigen (HBeAg), you have a chronic hepatitis B infection and you are more likely to spread the infection to others through sexual contact or by sharing needles
Antibodies to hepatitis C can most often be detected 4 to 10 weeks after you get the infection. Other types of tests may be done to decide on treatment and monitor the hepatitis C infection.
Risks
Risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
