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Tickborne encephalitis virus, Norway and Denmark.

Tone Skarpaas1, Irina Golovljova, Sirkka Vene

  • 1Sørlandet Hospital, Kristiansand, Norway. tone.skarpaas@sshf.no

Emerging Infectious Diseases
|July 14, 2006
PubMed
Summary

This study detected tickborne encephalitis virus (TBEV) RNA in Norwegian patients and ticks. It marks the first genome detection of TBEV in Norwegian patient serum, highlighting local transmission risks.

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Area of Science:

  • Virology
  • Epidemiology
  • Molecular Biology

Background:

  • Tickborne encephalitis (TBE) is a significant neurological disease caused by the TBE virus (TBEV).
  • Understanding TBEV circulation in Norway is crucial for public health.
  • Previous studies have not reported TBEV genome detection in Norwegian patient serum.

Purpose of the Study:

  • To detect TBEV RNA in serum samples from Norwegian patients and Norwegian ticks.
  • To perform sequencing and phylogenetic analysis of detected TBEV strains.
  • To establish the first evidence of TBEV genome detection in Norwegian patient serum.

Main Methods:

  • Reverse transcription-polymerase chain reaction (RT-PCR) was used to detect TBEV RNA.
  • Serum samples from two Norwegian TBE patients and 810 Norwegian ticks were analyzed.

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  • Sequencing and phylogenetic analysis were conducted on the detected viral RNA.

    • Main Results:

    • TBEV RNA was detected in the serum of two Norwegian patients.
    • TBEV RNA was also detected in Norwegian ticks, indicating local enzootic activity.
    • This study represents the first successful genome detection of TBEV in serum from Norwegian patients.

    Conclusions:

    • The findings confirm the presence of TBEV in Norway, with human infections linked to local transmission.
    • Genome detection in patient serum provides direct evidence of TBEV infection within Norway.
    • Further surveillance and research are warranted to understand TBEV epidemiology in the region.