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Hepatitis A.

Stephanie C Brundage1, A Nicole Fitzpatrick

  • 1South Carolina Department of Health and Environmental Control, Columbia, South Carolina, USA.

American Family Physician
|July 20, 2006
PubMed
Summary
This summary is machine-generated.

Hepatitis A vaccination has reduced cases and shifted infections to older adults. Prevention involves hygiene, prompt reporting, and vaccination for at-risk individuals and children.

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Area of Science:

  • Hepatology
  • Infectious Diseases
  • Public Health

Background:

  • Hepatitis A virus (HAV) is environmentally persistent, transmitted fecal-orally, and causes sporadic outbreaks.
  • Infections typically present symptomatically in older adults with jaundice, while children are often asymptomatic.
  • Fulminant hepatitis A, though rare (<1%), can be fatal or require liver transplantation.

Purpose of the Study:

  • To review the epidemiology, diagnosis, and prevention of Hepatitis A.
  • To highlight the impact of vaccination on disease incidence and demographics.
  • To provide guidance on vaccination strategies for different age groups and risk factors.

Main Methods:

  • Review of epidemiological data and clinical presentation of Hepatitis A.

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  • Discussion of diagnostic methods, including serological detection of anti-HAV IgM.
  • Analysis of prevention strategies, emphasizing hygiene, immune globulin, and vaccination.

    • Main Results:

    • Hepatitis A vaccination, introduced in 1995, decreased reported cases and increased the proportion of cases in older age groups.
    • Symptomatic infections in older individuals are characterized by abrupt onset, fever, and prolonged jaundice.
    • Chronic HAV infection has not been reported, but prolonged or relapsing courses occur in 10-20% of symptomatic cases.

    Conclusions:

    • Effective prevention relies on meticulous handwashing, safe food handling, and prompt public health interventions.
    • Routine vaccination is recommended for children aged 12-23 months.
    • Vaccination should be considered for older children, adults at increased risk, and individuals with chronic liver disease.