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Laboratory Tests and Interpretation of Results

Normal

Negative

Present in

Viral hepatitis A; can be IgM or IgG (if IgM, acute hepatitis A; if IgG, previous infection with hepatitis A)

See Fig. 26 for serologic tests in HAV infection.

Figure 26 Serologic tests in hepatitis A viral infection.

HAV, Hepatitis A virus; HAV-Ab, hepatitis A virus antibodies test; HAV-Ag, hepatitis A virus antigen test; Ig, immunoglobulin.

See Table E60 for serologic and virologic tests for hepatitis viruses.

TABLE E60 Serologic and Virologic Tests for Hepatitis Viruses

IgM
Anti-HAV
IgG
Anti-HAV
HBsAgAnti-HBsIgM
Anti-HBVc
HBeAgAnti-HBeHBV DNAAnti-HCV ScreenHCV RNAAnti-HDVAnti-HEV
HAV:
Acute++
Remote++
HBV:
Early+-++-+
Window--+--+
Resolving-/++--/++-/+
Chronic+-/+-++/-+
TX monitoring+
Remote-+--/++/--/+
HCV:
Screen++
Acute+/-+
Chronic++
TX monitoring+
Remote+-/+
HDV:
Superinfection+-+/-+-/++/-+
HEV+

DNA, Deoxyribonucleic acid; HAV, hepatitis A virus; HBeAg, hepatitis E antigen; HBsAg, hepatitis B surface antigen; HBV, hepatitis B virus; HCV, hepatitis C virus; HDV, hepatitis D virus; HEV, hepatitis E virus; Ig, immunoglobulin; RNA, ribonucleic acid; TX, Texas; +, positive; -, negative.

Data from CDC: Surveillance for acute hepatitis, United States, 2007, MMWR 58(SS-3), 2009. From McPherson RA, Pincus MR: Henry’s clinical diagnosis and management by laboratory methods, ed 23, Philadelphia, 2017, Elsevier.

Hepatitis A Viral Infection

Best all-purpose test(s) to diagnose acute HAV infection = HAV-Ab (IgM)

Best all-purpose test(s) to demonstrate past HAV infection/immunity = HAV-Ab (total)