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Tick-borne viruses in Norway.

T Traavik, R Mehl

    Medical Biology
    |October 1, 1975
    PubMed
    Summary

    This study mapped arboviruses in Norway, finding Uukuniemi virus group viruses and novel coronaviruses in ticks and wildlife. Antibodies to tick-borne encephalitis virus were prevalent in cattle.

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    Area of Science:

    • Veterinary Virology
    • Arthropod-borne Viruses
    • Norwegian Wildlife Health

    Background:

    • Arboviruses pose potential risks to animal and human health.
    • Understanding arbovirus distribution is crucial for public health surveillance.
    • Norway's diverse tick and host populations may harbor various arboviruses.

    Purpose of the Study:

    • To determine the presence and prevalence of arboviruses in Norway.
    • To assess the significance of identified arboviruses in local ecosystems.
    • To characterize novel viral agents found in Norwegian ticks and hosts.

    Main Methods:

    • Virus isolation attempts from various tick species (Ixodes ricinus, I. trianguliceps, I. uriae) and host blood.
    • Serological screening of avian, small mammal, cattle, and human blood samples.
    • Morphological and antigenic characterization of isolated viral strains.

    Main Results:

    • Five distinct virus strains were identified.
    • Three strains were related to the Uukuniemi virus group.
    • Two novel coronavirus-like strains were isolated from I. uriae ticks.
    • Antibodies to tick-borne encephalitis virus (TBEV) were common in cattle.
    • Uukuniemi virus antibodies were detected in birds, small mammals, cattle, and humans.
    • Coronavirus-like agent antibodies were found in seabirds.

    Conclusions:

    • Arboviruses, including Uukuniemi virus group agents and novel coronaviruses, are present in Norway.
    • Tick-borne encephalitis virus antibodies indicate TBEV circulation in cattle within I. ricinus distribution areas.
    • Widespread Uukuniemi virus antibodies suggest significant enzootic activity in Norwegian wildlife and livestock.
    • The identified coronavirus-like agents in seabirds represent a novel finding requiring further investigation.

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