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Published on: December 2, 2012

Virus meningo-encephalitis in Slovenia

J KMET, J VESENJAK-ZMIJANAC, M BEDJANIC

    Bulletin of the World Health Organization
    |January 1, 1955
    PubMed

    Insights

    Meningo-encephalitis in Slovenia is a seasonal tick-borne disease, primarily affecting young adults working outdoors. The virus likely circulates between rodents and ticks, with humans being accidentally infected.

    Area of Science:

    • Epidemiology
    • Virology
    • Public Health

    Background:

    • Meningo-encephalitis has been observed in Slovenia since 1946, presenting endemic patterns with occasional epidemic outbreaks.
    • A significant epidemic occurred in 1953, prompting detailed epidemiological investigation.

    Purpose of the Study:

    • To describe the main epidemiological features of meningo-encephalitis in Slovenia.
    • To investigate the characteristics of the 1953 epidemic, including seasonality, transmission vectors, and affected demographics.

    Main Methods:

    • Retrospective epidemiological analysis of meningo-encephalitis cases in Slovenia since 1946.
    • Focus on detailed study of the 1953 epidemic, including case histories and environmental associations.

    Main Results:

    • The disease exhibits marked seasonality, with 95% of 1953 cases occurring between May and September.
    • Tick bites were reported in a large number of cases, implicating Ixodes ricinus as the probable vector.
    • The disease predominantly affected individuals aged 11-30 (56.2% in 1953), often those working in tick-prevalent environments.
    • No person-to-person transmission was observed.

    Conclusions:

    • Meningo-encephalitis in Slovenia shares characteristics with tick-borne encephalitis in neighboring countries.
    • The virus is likely maintained in enzootic foci involving rodents and ticks.
    • Human infection is presumed to be accidental, resulting from exposure to infected ticks.
    Keywords:
    MENINGOENCEPHALITISTICKS

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