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Related Experiment Videos

Enterically-transmitted non-A, non-B hepatitis.

D W Bradley1

  • 1Hepatitis Branch, Centers for Disease Control, Atlanta, Georgia.

British Medical Bulletin
|April 1, 1990
PubMed
Summary
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Enterically transmitted non-A, non-B hepatitis (ET-NANB) is a significant cause of viral hepatitis in developing nations. Evidence suggests a single virus or related viruses, similar to caliciviruses, are responsible for ET-NANB outbreaks.

Area of Science:

  • Hepatology
  • Virology
  • Public Health

Background:

  • Hepatitis A virus (HAV) and Hepatitis B virus (HBV) do not account for over 50% of acute viral hepatitis in some developing countries.
  • Accumulating evidence indicates that a significant proportion of non-A, non-B hepatitis (NANB) is enterically transmitted.
  • Outbreaks of enterically-transmitted NANB (ET-NANB) have been documented globally, particularly in developing nations.

Purpose of the Study:

  • To identify the causative agent of enterically transmitted non-A, non-B hepatitis (ET-NANB).
  • To characterize the virus responsible for ET-NANB outbreaks.
  • To understand the epidemiological and clinical features of ET-NANB.

Main Methods:

  • Detection of virus-like particles (VLPs) in stool samples from infected individuals.

Related Experiment Videos

  • Experimental infection of non-human primates with stool samples to induce NANB.
  • Serological testing of infected primates against identified VLPs.

    • Main Results:

    • Small, non-enveloped VLPs (27-34 nm) were found in the stools of ET-NANB cases.
    • Experimental infection of various primate species with these VLPs successfully induced NANB.
    • Infected primates demonstrated seroconversion to the identified VLPs, suggesting a common or related viral cause across different geographic regions.
    • The candidate virus shares morphological and physicochemical similarities with human caliciviruses.

    Conclusions:

    • Enterically transmitted non-A, non-B hepatitis (ET-NANB) is likely caused by a single virus or a class of serologically related viruses.
    • The causative agent of ET-NANB exhibits characteristics similar to human caliciviruses.
    • ET-NANB poses a significant public health concern, especially in developing countries, due to its high mortality rate in pregnant women.