How is Hepatitis A diagnosed?

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Multiple Choice

How is Hepatitis A diagnosed?

Explanation:
Diagnosing acute Hepatitis A relies on detecting an acute immune response to the virus in the blood. The best indicator is the presence of IgM antibodies against HAV in serum; this specific marker appears as illness begins and confirms a recent infection, fading over a few months. In contrast, total HAV antibodies reflect immunity from past infection or vaccination, not current disease. Molecular testing for HAV RNA by PCR can be used in certain situations or when serology is inconclusive, but it’s not the routine method for most cases. Elevated liver enzymes signal liver injury and are non-specific—they tell you there’s hepatitis, but not which virus is responsible.

Diagnosing acute Hepatitis A relies on detecting an acute immune response to the virus in the blood. The best indicator is the presence of IgM antibodies against HAV in serum; this specific marker appears as illness begins and confirms a recent infection, fading over a few months. In contrast, total HAV antibodies reflect immunity from past infection or vaccination, not current disease. Molecular testing for HAV RNA by PCR can be used in certain situations or when serology is inconclusive, but it’s not the routine method for most cases. Elevated liver enzymes signal liver injury and are non-specific—they tell you there’s hepatitis, but not which virus is responsible.

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