text: Hepatitis A cannot be differentiated from other types of viral hepatitis on the basis of clinical or epidemiologic features alone. Laboratory tests are required for its diagnosis. Serologic tests in hepatitis A virus (HAV) infection reveal elevated IgM anti-HAV in the acute phase (gold standard) in addition to an elevated IgG anti-HAV that remains elevated for the person's lifetime.  Additional laboratory<unk>  include the detection and sequencing of HAV RNA, an elevated direct bilirubin, and elevated liver enzymes. Liver biopsy has a minimal role in the diagnosis of HAV infection and it is only used when the diagnosis is unclear or when relapse is suspected.
option_0: Hepatitis A laboratory findings
option_1: Autoimmune hepatitis laboratory findings
option_2: Hepatitis A physical examination
option_3: Hepatitis B diagnostic criteria
option_4: Autoimmune hepatitis physical examination
option_5: Hepatitis C physical examination
option_6: Hepatitis E physical examination
option_7: Alcoholic hepatitis physical examination