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Related Experiment Videos

Solid-phase radioimmunoassay as a method for evaluating antigenic differences in type A influenza viruses.

J H Schieble, D Cottam

    Infection and Immunity
    |January 1, 1977
    PubMed
    Summary
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    A new radioimmunoassay (RIA) method accurately measures changes in type A influenza virus surface antigens. This sensitive technique can differentiate strains, aiding in tracking influenza virus antigenic variation.

    Area of Science:

    • Virology
    • Immunology
    • Biotechnology

    Background:

    • Type A influenza viruses exhibit significant antigenic variation in their surface hemagglutinin and neuraminidase antigens.
    • Monitoring these antigenic changes is crucial for understanding influenza virus evolution and for vaccine development.

    Purpose of the Study:

    • To develop and validate an indirect solid-phase radioimmunoassay (RIA) for assessing antigenic variation in type A influenza virus surface antigens.
    • To evaluate the reproducibility and sensitivity of the developed RIA procedure.
    • To compare the antigenic profiles of the A/Aichi/68 strain with other type A influenza strains.

    Main Methods:

    • Development of an indirect solid-phase radioimmunoassay (RIA).
    • Optimization of RIA test variables and assessment of reproducibility (approx. 20% variation).

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  • Comparative antigenic analysis of A/Aichi/68 and other type A influenza strains using specific antisera.

    • Main Results:

    • The RIA procedure demonstrated good reproducibility.
    • The method quantitatively differentiated the surface antigens of A/Aichi/68 from preceding and succeeding type A strains.
    • Both hemagglutinin and neuraminidase antigens could be independently characterized within a single test system.

    Conclusions:

    • The developed RIA is a sensitive and reproducible method for evaluating antigenic variation in type A influenza viruses.
    • The RIA allows for independent characterization of hemagglutinin and neuraminidase antigens.
    • This technique offers a valuable tool for serological surveillance of influenza virus evolution.