Laboratory Testing for Hepatitis A and E

Hepatitis A Epidemiology

September 2008

Most cases of Hepatitis A are sporadic, however there are outbreaks known to occur in North America, and these are usually food borne outbreaks. The most common transmission occurs through contaminated food or water sources, but there can also be person-to-person transmission through fecal-oral routes.

The source of the infection comes also from persons excreting Hepatitis A particles in their stool. They are infectious from 2-3 weeks before the onset of jaundice, up to about a week after jaundice appears in the infected individuals. Fortunately, there is no carrier state, and thus there is no chronic Hepatitis A as a sequelae.

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Hepatitis A Epidemiology

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Jump to section:

• Introduction
• Patient Case
• Geographic Distribution of Hepatitis A Virus Infection
• Hepatitis A Epidemiology
• Hepatitis A Virus Infection Typical Serologic Course
• Hepatitis A Diagnosis
• Assay Methods for HAV Serologic Markers
• Patient Case
• Interpretation of HAV Serologic Marker Test Results
• Patient Case
• Incidence of Acute Hepatitis A by Year
• Incidence of Acute Hepatitis A by Age
• Trends in Epidemiologic Characteristics
• Incidence of Acute Hepatitis A by Race/Ethnicity
• Geographic Distribution of Hepatitis E
• Hepatitis E Epidemiology
• Hepatitis E Virus Infection
• Hepatitis E Diagnosis
• Summary Hepatitis A
• Summary Hepatitis E
• Questions?
• Disclosure