Abstract
We isolated 11 Siberian subtype tickborne encephalitis virus (TBEV) strains from Ixodes persulcatus ticks from a TBEV-endemic focus in the Kokkola Archipelago, western Finland. Thus I. persulcatus and the Siberian TBEV are reported in a focus considerably northwest of their previously known range in eastern Europe and Siberia.
Highlights
We isolated 11 Siberian subtype tickborne encephalitis virus (TBEV) strains from Ixodes persulcatus ticks from a TBEV-endemic focus in the Kokkola Archipelago, western Finland
The virus was found in the same areas as early as the 1960s by screening antibodies to TBEV from cattle sera [10]
A Tickborne encephalitis (TBE) focus has existed in the Kokkola Archipelago at least since the 1960s when TBEV antibodies were detected in cattle [10], but the local TBE viruses have not been characterized
Summary
We isolated 11 Siberian subtype tickborne encephalitis virus (TBEV) strains from Ixodes persulcatus ticks from a TBEV-endemic focus in the Kokkola Archipelago, western Finland. Three subtypes of the causative agent tickborne encephalitis virus (TBEV) are known: the European, Siberian, and Far Eastern [1,2]. In Finland, the TBE-endemic areas are mostly in the coastal regions: two thirds of cases come from the Åland Islands.
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