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Related Experiment Videos

WHO collaborative studies on enterovirus reference antisera. Third report.

J L Melnick, B Hampil

    Bulletin of the World Health Organization
    |January 1, 1970
    PubMed
    Summary

    This study evaluated equine antisera for enteroviruses, finding high homologous antibody titers indicating their usefulness as reference standards. Further testing is ongoing for additional enterovirus equine sera.

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    Area of Science:

    • Virology
    • Immunology
    • Public Health

    Background:

    • Enteroviruses are a significant public health concern.
    • Standardized reference antisera are crucial for accurate viral identification and diagnosis.
    • Previous studies have established the need for comprehensive characterization of equine antisera.

    Purpose of the Study:

    • To assess the specificity and utility of equine antisera against prototype enteroviruses.
    • To determine homologous and heterotypic antibody titers in prepared reference sera.
    • To provide guidance for the effective use of enterovirus equine antisera.

    Main Methods:

    • Cooperative testing of equine antisera by multiple international laboratories.
    • Neutralizing antibody tests against homologous viruses, regional homotypic strains, and heterotypic viruses (reoviruses, adenoviruses).

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  • Analysis of serum samples from horses before and after immunization with enterovirus antigens.

    • Main Results:

    • High homologous geometric mean titers were observed for most echovirus (≥10,000 for 9/16 sera) and coxsackievirus A (5,000-15,000 for 4/5 sera) immune sera.
    • Pre-inoculation sera showed negative antibody levels.
    • Homotypic tests indicated the usefulness of the sera, with heterotypic antibody data recorded for guidance.

    Conclusions:

    • The evaluated enterovirus equine antisera demonstrate high specificity and significant homologous antibody titers.
    • These antisera are valuable as reference standards for enterovirus detection and characterization.
    • Ongoing cooperative testing will further expand the availability of validated enterovirus reference materials.