Abstract
Serological and nucleic acid tests for detecting hepatitis E virus (HEV) have been developed for both epidemiologic and diagnostic purposes. The laboratory diagnosis of HEV infection depends on the detection of HEV antigen or HEV RNA in the blood, stool, and other body fluids, and serum antibodies against HEV (immunoglobulin [Ig]A, IgM, and IgG). Anti-HEV IgM antibodies and low avidity IgG can be detected during the acute phase of the illness and can last approximately 12 months, representing primary infection, whereas anti-HEV IgG antibodies can last more than several years, representing remote exposure. Thus, the diagnosis of acute infection is based on the presence of anti-HEV IgM, low avidity IgG, HEV antigen, and HEV RNA, while epidemiological investigations are mainly based on anti-HEV IgG. Although significant progress has been made in developing and optimizing different formats of HEV assays, improving their sensitivity and specificity, there are many shortcomings and challenges in inter-assay concordance, validation, and standardization. This article reviews the current knowledge on the diagnosis of HEV infection, including the most common available laboratory diagnostic techniques.
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Abbreviations
- ALF:
-
Acute liver failure
- ALP:
-
Alkaline phosphatase
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- EASL:
-
The European Association for the Study of the Liver
- EIA:
-
Enzyme immunoassay
- GGT:
-
γ-glutamyl transferase
- HEV:
-
Hepatitis E Virus
- IgA:
-
Immunoglobulin A
- IgG:
-
Immunoglobulin G
- IgM:
-
Immunoglobulin M
- IS:
-
International Standard
- NAT:
-
Nucleic acid amplification technology
- ORF:
-
Open reading frame
- TBA:
-
Total iron binding capacity
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Zhao, C., Wang, Y. (2023). Laboratory Diagnosis of HEV Infection. In: Wang, Y. (eds) Hepatitis E Virus. Advances in Experimental Medicine and Biology, vol 1417. Springer, Singapore. https://doi.org/10.1007/978-981-99-1304-6_14
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