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Vaccinia virus in postvaccinal encephalitis.

E B Gurvich, I S Vilesova

    Acta Virologica
    |March 1, 1983
    PubMed
    Summary

    Vaccinia virus was detected in children with neurological complications following smallpox vaccination, confirming its role in postvaccinal encephalitis. This indicates the virus can cause severe neurological issues when host immunity is altered.

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    Area of Science:

    • Virology
    • Neurology
    • Immunology

    Background:

    • Neurological complications can arise after smallpox vaccination.
    • Understanding the causative agents of these complications is crucial for public health.

    Purpose of the Study:

    • To investigate the virological basis of neurological complications in children post-smallpox vaccination.
    • To confirm the presence and role of vaccinia virus in postvaccinal encephalitis.

    Main Methods:

    • Virological examination of 239 samples from 84 children with neurological complications.
    • Sample types included blood, cerebrospinal fluid, pharyngeal secretions, and autopsy specimens.
    • Virus isolation and detection methods were employed.

    Main Results:

    • Vaccinia virus was isolated from 57.5% of children with postvaccinal encephalitis.
    • The virus was detected in cerebrospinal fluid during the acute disease period in 54.2% of cases.
    • Vaccinia virus was identified in brain and spinal cord tissues in fatal cases.

    Conclusions:

    • Vaccinia virus actively participates in the pathogenesis of postvaccinal encephalitis.
    • The pathogenicity of vaccinia virus is linked to altered host reactivity in vaccinated individuals.
    • These findings underscore the importance of monitoring neurological adverse events post-vaccination.

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