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Tick-borne encephalitis virus activity in Styria, Austria

M Labuda1, D Stünzner, O Kozuch

  • 1Institute of Virology, Slovak Academy of Sciences, Bratislava.

Acta Virologica
|April 1, 1993
PubMed
Summary

Tick-borne encephalitis (TBE) virus was detected in ticks and small mammals in Styria, Austria. Rodents like Apodemus flavicollis showed high TBE virus prevalence, indicating a significant risk.

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Area of Science:

  • Veterinary Entomology
  • Viral Ecology
  • Epidemiology

Background:

  • Tick-borne encephalitis (TBE) is a significant viral zoonosis transmitted by Ixodes ticks.
  • Understanding the prevalence and distribution of TBE virus in endemic areas is crucial for public health.
  • Rodents are key reservoirs for TBE virus, influencing its transmission dynamics.

Purpose of the Study:

  • To investigate the presence and prevalence of TBE virus in Ixodes ricinus ticks and small mammal populations in Styria, Austria.
  • To identify potential tick and rodent reservoirs for TBE virus in the surveyed region.
  • To assess the minimum field infection rate of TBE virus in ticks.

Main Methods:

  • Collection and analysis of 3,404 Ixodes ricinus ticks from 12 localities in Styria.

Related Experiment Videos

  • Isolation and identification of TBE virus from collected ticks.
  • Trapping and serological examination of small mammals (Apodemus flavicollis, Clethrionomys glareolus) for TBE virus neutralizing antibodies.
  • Determination of minimum field infection rate (mFIR) in ticks.

    • Main Results:

    • Fifteen TBE virus isolates were recovered from ticks, with a minimum field infection rate of 4.4 per 1,000 ticks.
    • Five TBE virus isolates were identified in target organs of Apodemus flavicollis.
    • High seroprevalence of TBE virus antibodies was found in Apodemus flavicollis (47.9%) and Clethrionomys glareolus (29.4%).
    • These rodent species constituted a significant portion of the trapped small mammal population.

    Conclusions:

    • Ixodes ricinus ticks and small mammals, particularly Apodemus flavicollis and Clethrionomys glareolus, are important reservoirs and vectors for TBE virus in Styria.
    • The findings highlight the ongoing circulation of TBE virus in this Austrian region.
    • Further surveillance and public health measures are warranted to mitigate TBE transmission risks.