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The first tick-borne encephalitis virus isolates from Norway.

T Traavik, R Mehl, R Wiger

    Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology
    |August 1, 1978
    PubMed
    Summary
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    Five tick-borne encephalitis (TBE) virus strains were found in Ixodes ricinus ticks in Norway. This discovery highlights potential public health risks in TBE-endemic regions.

    Area of Science:

    • Virology
    • Arthropod-borne Diseases
    • Epidemiology

    Background:

    • Tick-borne encephalitis (TBE) is a significant public health concern in Europe and Asia.
    • Ixodes ricinus ticks are known vectors for various pathogens, including TBE virus.
    • Previous studies have indicated the presence of TBE virus in Scandinavian tick populations.

    Purpose of the Study:

    • To isolate and identify novel virus strains from Ixodes ricinus ticks in Norway.
    • To determine the serological relationship of isolated viruses to the tick-borne encephalitis (TBE) complex.
    • To assess the potential risk of TBE virus transmission in specific geographical locations within Norway.

    Main Methods:

    • Collection of Ixodes ricinus ticks from three distinct locations in Sogn & Fjordane County, Norway.

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  • Virus isolation and propagation in cell cultures.
  • Serological assays to determine the relationship of isolated viruses to the TBE complex.

    • Main Results:

    • Five distinct virus strains were successfully isolated from the collected ticks.
    • All five isolated strains exhibited a close serological relationship to the tick-borne encephalitis (TBE) complex.
    • One virus-yielding tick pool originated from a tourist camping ground, indicating potential human exposure risk.

    Conclusions:

    • The findings confirm the circulation of TBE virus or closely related viruses in Ixodes ricinus ticks in Norway.
    • The isolation of these viruses, particularly from a tourist area, underscores the public health importance of TBE surveillance.
    • Further research is warranted to fully characterize these novel strains and assess their pathogenicity and epidemiological significance.