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Related Experiment Videos

Attenuated Junin virus infection in Callithrix jacchus.

M M Avila, M J Frigerio, E L Weber

    Journal of Medical Virology
    |January 1, 1985
    PubMed
    Summary

    The attenuated XJC13 strain of Junin virus caused a mild infection in marmosets, conferring protection against the pathogenic strain. This Junin virus vaccine candidate shows promise for preventing severe disease.

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    Area of Science:

    • Virology
    • Immunology
    • Primatology

    Background:

    • Junin virus (JUNV) causes Argentine hemorrhagic fever, a severe disease with high mortality.
    • Development of safe and effective vaccines against JUNV is crucial for public health.
    • Attenuated viral strains are often explored as vaccine candidates.

    Purpose of the Study:

    • To evaluate the safety and immunogenicity of the attenuated JUNV XJC13 strain in marmosets.
    • To assess the protective efficacy of XJC13 against challenge with a pathogenic JUNV strain.
    • To investigate viral persistence and host response following inoculation with XJC13.

    Main Methods:

    • Twenty marmosets were inoculated with the attenuated XJC13 strain (n=15) or served as controls (n=5).
    • Animals were monitored for 420 days, with virologic, hematologic, serologic, and histologic assessments.

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  • Immunofluorescence (IF) and challenge studies with pathogenic JUNV were performed.

    • Main Results:

    • XJC13 infection was mild, causing transient weight loss but no mortality or significant illness.
    • Viremia was detected from days 6-22; viral antigen was found in lymphoid organs, lungs, spleen, adrenals, and brain.
    • XJC13-inoculated marmosets were protected from lethal challenge with pathogenic JUNV at 60 and 380 days post-infection.

    Conclusions:

    • The attenuated XJC13 strain of Junin virus is safe and well-tolerated in marmosets.
    • XJC13 infection induces a protective immune response against virulent JUNV challenge.
    • This attenuated strain represents a promising candidate for a Junin virus vaccine.