Understanding Lab Tests for Acute Hepatitis A
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Acute Hepatitis A is a viral infection that causes inflammation of the liver. It is caused by the Hepatitis A virus (HAV) and typically spreads through contaminated food, water, or close contact with infected individuals. Specific blood tests are essential for confirming the diagnosis and distinguishing it from other types of hepatitis.
Top Recommended Test
Hepatitis A IgM Antibody
This test detects IgM antibodies specifically produced by the immune system in response to an acute Hepatitis A infection. The presence of HAV IgM in blood is the primary indicator of a recent infection with the virus, making it the gold standard for diagnosing acute Hepatitis A.
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Diagnosing Acute Hepatitis A
While symptoms such as fatigue, nausea, abdominal pain, and jaundice may suggest hepatitis, blood testing is required for a definitive diagnosis. The body's immune response to HAV produces specific antibodies that can be detected and measured, providing clear evidence of infection.
Other Relevant Tests
Hepatitis Panel Acute, w/ Ref Confirmation
This comprehensive panel includes testing for Hepatitis A IgM antibodies along with other hepatitis markers. The presence of Hepatitis A IgM indicates a recent infection with the virus, which causes liver disease that usually resolves within two months. This panel helps differentiate between different types of acute hepatitis.
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Understanding Your Results
A positive IgM antibody test confirms acute Hepatitis A infection. Most people recover completely from Hepatitis A within a few weeks to months, and the infection provides lifelong immunity. Follow-up testing may be recommended to monitor recovery and ensure liver function returns to normal.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
