Hepatitis A IgM Antibody

The Hepatitis A IgM Antibody test contains 1 test with 1 biomarker.

Description: The Hepatitis A IgM Antibody test is a blood test used to screen for recent exposure to Hepatitis A and to help diagnose liver infection.

Also Known As: HAV AB Test, Hepatitis A Virus Antibody Test, Anti HAV Test, Anti Hepatitis A Virus Test

Collection Method: Blood Draw

Specimen Type: Serum

Test Preparation: No preparation required

When is a Hepatitis A IgM Antibody test ordered?

When someone shows evidence of an acute infection, testing for hepatitis A antibodies is recommended.

When a person is suspected to have been exposed to the virus, regardless of whether or not symptoms are present, a HAV test may be conducted.

Testing is also often ordered to show proof of immunization.

What does a Hepatitis A IgM Antibody blood test check for?

Hepatitis A is a highly infectious liver infection caused by hepatitis A virus. Hepatitis is a condition marked by inflammation and enlargement of the liver, and it can be caused by a variety of things. This test looks for antibodies produced by the immune system in response to a hepatitis A infection in the blood.

Hepatitis A is one of five hepatitis viruses known to cause the disease, with the others being B, C, D, and E. Hepatitis A can cause a severe, acute illness that lasts 1 to 2 months, but unlike the other hepatitis viruses, it does not create a persistent infection.

Hepatitis A is transmitted from person to person most usually by stool contamination or by swallowing food or water contaminated by an infected person's stool. Direct contact with an infected person, international travel, direct contact with a newly arrived international adoptee, a recognized foodborne outbreak, men having sex with men, and use of illegal drugs are all recognized risk factors for hepatitis A.

Hepatitis can be caused by a variety of things, but the symptoms are all the same. The liver is damaged and unable to function normally in hepatitis. It can't remove toxins or waste products like bilirubin from the body since it can't digest them. Bilirubin and liver enzyme levels in the blood can rise as the disease progresses. While tests like bilirubin or a liver panel can inform a doctor if someone has hepatitis, they don't tell them what's causing it. Hepatitis viral antibody testing may aid in determining the etiology.

Lab tests often ordered with a Hepatitis A IgM Antibody test:

  • Hepatitis A IgG Antibody test
  • Hepatitis B Testing
  • Hepatitis C Testing
  • Hepatitis Panel
  • Hepatic Function Panel
  • Comprehensive Metabolic Panel
  • AST
  • ALT
  • ALP
  • Bilirubin

Conditions where a Hepatitis A IgM Antibody test is recommended:

  • Liver Disease
  • Viral Hepatitis
  • Traveler’s Diseases
  • Food and Waterborne Illness

How does my health care provider use a Hepatitis A IgM Antibody test?

This test is used to diagnose a hepatitis A virus caused liver infection. Hepatitis and its symptoms can be caused by a variety of things, therefore this test can help you figure out if your symptoms are caused by hepatitis A.

This test will also come back positive after a person has received the Hepatitis A vaccine, therefore it can be used to see if they have developed immunity following immunization.

Other tests, such as bilirubin, hepatic function panel, ALT, and AST, may be used in conjunction with viral hepatitis testing to assist diagnose the condition in acute hepatitis.

What do my Hepatitis A Antibody test results mean?

A total antibody test identifies both IgM and IgG antibodies without distinguishing between the two.

If the test is positive and the person has never been vaccinated against HAV, then person has been exposed to the virus. Hepatitis A antibodies are found in about 30% of persons over the age of 40.

If the test is negative, then the person has neither been exposed or vaccinated against the Hepatitis A Virus.

Results of this hepatitis testing may indicate the following:

  • If Hepatitis A IgM Antibody is positive the results indicate Acute or recent Hepatitis A virus infection.
  • If Hepatitis A IgM Antibody is negative and the Hepatitis A Antibody, Total is positive then the results indicate no active infection but previous Hepatitis A virus exposure; has developed immunity to Hepatitis A virus or recently vaccinated for Hepatitis A virus.
  • Dietary supplements containing biotin may interfere in assays and may skew analyte results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.

We advise having your results reviewed by a licensed medical healthcare professional for proper interpretation of your results.

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Hepatitis A IgM

*Process times are an estimate and are not guaranteed. The lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

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