欧博官网Clinical Screening and Diagnosis for Hepatitis
Screening and testing guidelines
You will not be able to differentiate hepatitis A virus from other types of viral hepatitis using clinical or epidemiological features alone. Clinicians should conduct test(s) to make an accurate diagnosis.
The following are laboratory markers that, if present, indicate an acute HAV infection:
Immunoglobulin M antibodies to HAV (IgM anti-HAV) in serum, or
HAV RNA is serum or stool1
The following is the serologic marker that, if present, indicates either immunity from prior infection or vaccination:
Immunoglobulin G antibodies to HAV (IgG anti-HAV)
Serologic tests for IgG anti-HAV and total anti-HAV (IgM and IgG anti-HAV combined) are not helpful in diagnosing acute illness. You should only test patients for IgM anti-HAV if they are symptomatic, and you suspect HAV infection. Alanine aminotransferase (ALT) and total bilirubin tests can aid in diagnosis.