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Volume 12, Number 10—October 2006
Dispatch

Siberian Subtype Tickborne Encephalitis Virus, Finland

Anu Jääskeläinen*Comments to Author , Tapani Tikkakoski†, Nathalie Uzcátegui*, Andrey Alekseev‡, Antti Vaheri*§, and Olli Vapalahti*§¶
Author affiliations: *Haartman Institute, University of Helsinki, Helsinki, Finland; †Keski-Pohjanmaa Central Hospital, Kokkola, Finland; ‡Russian Academy of Sciences, St. Petersburg, Russia; §HUSLAB Hospital District of Helsinki and Uusimaa, Helsinki, Finland; ¶Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland

Main Article

Table 1

Tick collection sites in Kokkola Archipelago, June 2004*

Location TBE case-patient, sex/age/y No. ticks (n/f/m) No. tick pools Tick pools positive in RT-PCR† Tick pools positive in virus isolation†
1 M/48/2004 (12) 184 (19/87/78) 19 4, 8, 9 8, 9
2 M/21/2002 (11) 80 (24/25/31) 8 25, 26 25, 26
3 F/24/2002 (11) 158 (2/87/69) 16 39 39
4 F/12/2002 (11) 474 (16/227/231) 48 79, 81, 84, 85, 86, 102, 118 79, 81, 84, 86, 102, 118
5 F/73/2002 (11) 41 (2/22/17) 5 – ND
6 M/6/2003 166 (6/83/77) 17 – ND
7 M/7/2003 6 (0/3/3) 1 – ND
8 No known cases 55 (1/25/29) 6 – ND
9 No known cases 9 (2/5/2) 1 – ND
10 No known cases 8 (0/6/2) 1 – ND

*TBE, tickborne encephalitis; RT-PCR, reverse transcription–polymerase chain reaction; n, nymphs; f, adult females; m, adult males; ND, not determined.
†Nos. indicate the tick pool numbers, the same as used in the phylogenetic tree.

Main Article

References
  1. Ecker  M, Allison  SL, Meixner  T, Heinz  FX. Sequence analysis and genetic classification of tick-borne encephalitis viruses from Europe and Asia. J Gen Virol. 1999;80:179–85.PubMedGoogle Scholar
  2. Hayasaka  D, Ivanov  L, Leonova  GN, Goto  A, Yoshii  K, Mizutani  T, Distribution and characterization of tick-borne encephalitis viruses from Siberia and far-eastern Asia. J Gen Virol. 2001;82:1319–28.PubMedGoogle Scholar
  3. Lundkvist  K, Vene  S, Golovljova  I, Mavtchoutko  V, Forsgren  M, Kalnina  V, Characterization of tick-borne encephalitis virus from Latvia: evidence for co-circulation of three distinct subtypes. J Med Virol. 2001;65:730–5. DOIPubMedGoogle Scholar
  4. Charrel  RN, Attoui  H, Butenko  AM, Clegg  JC, Deubel  V, Frolova  TV, Tick-borne virus diseases of human interest in Europe. Clin Microbiol Infect. 2004;10:1040–55. DOIPubMedGoogle Scholar
  5. Golovljova  I, Vene  S, Sjolander  KB, Vasilenko  V, Plyusnin  A, Lundkvist  Å. Characterization of tick-borne encephalitis virus from Estonia. J Med Virol. 2004;74:580–8. DOIPubMedGoogle Scholar
  6. Jaenson  TG, Talleklint  L, Lundqvist  L, Olsen  B, Chirico  J, Mejlon  H. Geographical distribution, host associations, and vector roles of ticks (Acari: Ixodidae, Argasidae) in Sweden. J Med Entomol. 1994;31:240–56.PubMedGoogle Scholar
  7. Öhman  C. The geographical and topographical distribution of Ixodes ricinus in Finland. Acta Societatis Pro Fauna et Flora Fennica. 1961;76:1–25.
  8. International Scientific Working Group on Tick-Borne Encephalitis. 2006 Jan 11 [cited 2006 Mar 14]. Available from http://www.tbe-info.com/tbe.aspx
  9. Wahlberg  P, Saikku  P, Brummer-Korvenkontio  M. Tick-borne viral encephalitis in Finland. The clinical features of Kumlinge disease during 1959–1987. J Intern Med. 1989;225:173–7. DOIPubMedGoogle Scholar
  10. Tuomi  J, Brummer-Korvenkontio  M. Antibodies against viruses of the tick-borne encephalitis group in cattle sera in Finland. Ann Med Exp Biol Fenn. 1965;43:149–54.PubMedGoogle Scholar
  11. Marjelund  S, Tikkakoski  T, Tuisku  S, Räisänen  S. Magnetic resonance imaging findings and outcome in severe tick-borne encephalitis. Report of four cases and review of the literature. Radiol. 2004;45:88–94.PubMedGoogle Scholar
  12. Marjelund  S, Jääskeläinen  A, Tikkakoski  T, Tuisku  S, Vapalahti  O. Gadolinium enhancement of the cauda equina—a new MR imaging finding in a myeloradiculitic form of tick-borne encephalitis. AJNR Am J Neuroradiol. 2006;27:995–7.PubMedGoogle Scholar
  13. Puchhammer-Stöckl  E, Kunz  C, Mandl  CW, Heinz  FX. Identification of tick-borne encephalitis virus ribonucleic acid in tick suspensions and in clinical specimens by a reverse transcription-nested polymerase chain reaction assay. Clin Diagn Virol. 1995;4:321–6. DOIPubMedGoogle Scholar
  14. Caporale  DA, Rich  SM, Spielman  A, Telford  SR III, Kocher  TD. Discriminating between Ixodes ticks by means of mitochondrial DNA sequences. Mol Phylogenet Evol. 1995;4:361–5. DOIPubMedGoogle Scholar
  15. Han  X, Aho  M, Vene  S, Peltomaa  M, Vaheri  A, Vapalahti  O. Prevalence of tick-borne encephalitis virus in Ixodes ricinus ticks in Finland. J Med Virol. 2001;64:21–8. DOIPubMedGoogle Scholar

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