Hepatitis A IgM Antibody


Hepatitis A IgM Antibody - IgM antibodies to Hepatitis A suggest a current, acute or recent Hepatitis A infection.


The Hepatitis A IgM Antibody test is a blood test that specifically detects the presence of immunoglobulin M (IgM) antibodies against the Hepatitis A virus (HAV). IgM antibodies are a type of antibody produced by the immune system in response to a recent or acute infection. In the context of Hepatitis A, the presence of IgM antibodies typically indicates a current or recent infection with the virus.

Here are some key points about the Hepatitis A IgM Antibody test:

IgM Antibodies: IgM antibodies are the first antibodies produced by the immune system during the early stages of an infection. They are particularly associated with the acute phase of the disease.

Acute Hepatitis A Infection: The presence of Hepatitis A IgM antibodies suggests recent exposure to the virus, and this test is often used to diagnose acute Hepatitis A infection. It's particularly helpful when someone presents with symptoms such as jaundice, fatigue, and abdominal pain.

Timing of IgM Antibodies: IgM antibodies are typically detectable shortly after the onset of symptoms, and their levels may decline over time as the infection resolves. In some cases, IgM antibodies can be detectable for several months after the acute phase.

It's important to note that the presence of IgM antibodies is not indicative of chronic infection with Hepatitis A. Most individuals will clear the virus from their system, and IgM antibodies will eventually decrease.

This test is useful in various clinical scenarios:

Diagnosis of Acute Infection: It helps confirm whether a person is currently infected with Hepatitis A.

Outbreak Investigations: During outbreaks or clusters of Hepatitis A cases, testing for IgM antibodies can be used to identify recent infections.

Monitoring Response to Vaccination: In some cases, the test may be used to assess the immune response to Hepatitis A vaccination, especially when conducted shortly after vaccination.

Interpretation of the test results should be done by healthcare professionals in the context of the individual's medical history, symptoms, and potential exposure risks.



Hepatitis A IgM Antibody


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Reference Range(s)


Fasting Required: No

Turnaround Time: 3 Days

Test Code: 512

Preferred Specimen: Serum