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[Serological characteristics of a hepatitis E outbreak].
Chun-rong Tan1, Min Chen, Sheng-xiang Ge
1Department of Clinical Laboratory, Beijing Railway General Hospital, Beijing 100038, China. crtan@vip.sina.com.
Summary
Hepatitis E virus (HEV) caused an outbreak linked to food intake. Serological testing for anti-HEV IgM and IgG aids in diagnosis and population surveillance, with higher infection rates observed in the exposed group.
Area of Science:
- Epidemiology
- Virology
- Immunology
Context:
- A hepatitis E outbreak occurred, necessitating investigation into its serological characteristics.
- A dining hall served as a potential source of transmission within a department.
- A neighboring department without shared dining facilities served as a control group.
Purpose:
- To investigate the serological profile of a hepatitis E outbreak.
- To determine the prevalence of anti-HEV IgM and IgG antibodies in an affected population and a control group.
- To assess the relationship between serological markers, liver enzyme levels, and demographic factors.
Summary:
- The outbreak was confirmed as hepatitis E, with significantly higher rates of anti-HEV IgM and IgG in the outbreak population compared to controls.
- Individuals with anti-HEV IgM antibodies showed higher rates of abnormal ALT levels, indicating active infection.
- Antibody titers demonstrated a typical immune response pattern, with IgM declining and IgG persisting, suggesting boosted immunity during the outbreak.
Impact:
- Confirms Hepatitis E virus (HEV) as the causative agent of the outbreak, linked to food consumption.
- Highlights the utility of anti-HEV IgM and IgG testing for both diagnosing hepatitis E and conducting surveillance in large populations.
- Indicates that while attack risk is not associated with age or sex, abnormal ALT levels are more prevalent in newly infected males.