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Viral hepatitis: from A to E, and beyond?

Ding Shinn Chen1

  • 1Department of Internal Medicine and Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.

Journal of the Formosan Medical Association = Taiwan Yi Zhi
|December 24, 2003
PubMed
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Hepatitis A virus infection has decreased due to hygiene, but younger populations are susceptible. Hepatitis B and C remain significant global health concerns, with advancements in prevention and treatment offering hope.

Area of Science:

  • Hepatology
  • Virology
  • Infectious Diseases

Background:

  • Hepatitis virus identification enables study of epidemiology, pathogenesis, and prevention.
  • Improved hygiene reduced Hepatitis A virus (HAV) infections but increased susceptibility in younger populations.
  • Hepatitis B virus (HBV) and Hepatitis C virus (HCV) remain major global health issues, causing chronic liver disease and cancer.

Purpose of the Study:

  • To review the current understanding of hepatitis viruses A-E.
  • To discuss the epidemiology, pathogenesis, sequelae, and prevention strategies for each hepatitis virus.
  • To highlight recent advancements in immunization and treatment for hepatitis infections.

Main Methods:

  • Literature review of hepatitis virus research.

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  • Analysis of epidemiological data and disease burden.
  • Evaluation of prevention and treatment strategies, including immunization and antiviral therapies.

    • Main Results:

    • Hepatitis A virus (HAV) infection rates have declined with improved hygiene, and effective immunization is available.
    • Hepatitis B virus (HBV) remains prevalent, particularly in Asia and Africa; mass immunization has shown success in reducing chronic infection.
    • Hepatitis C virus (HCV) is a leading cause of death, with treatments like interferon and ribavirin showing promise; Hepatitis D and E prevalence has decreased or is geographically limited.
    • Newly identified candidate viruses (GBV-C, TT, SEN) have not been proven to cause hepatitis.

    Conclusions:

    • Effective immunization strategies are crucial for controlling HAV and HBV.
    • While no vaccine exists for HCV, advancements in treatment offer better management of chronic infection.
    • Hepatitis D and E infections are less common, with specific risk factors identified.
    • Ongoing research is necessary to understand and manage emerging viral threats.