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Tick-borne meningoencephalitis virus
Tick-Borne Encephalitis Virus.png
Virus classification
Group: Group IV ((+)ssRNA)
Family: Flaviviridae
Genus: Flavivirus
Species: Tick-borne meningoencephalitis virus

Tick-borne encephalitis virus (TBEV) is the virus associated with tick-borne encephalitis.

Taxonomy[edit]

TBEV is a member of the genus Flavivirus. Other close relatives include Omsk hemorrhagic fever virus, Kyasanur forest disease virus, Alkhurma virus, Louping ill virus and the Langat virus.

Subtypes[edit]

TBEV has three subtypes:

  • Western European subtype (formerly Central European encephalitis virus, CEEV; principal tick vector: Ixodes ricinus);
  • Siberian subtype (formerly West Siberian virus; principal tick vector: Ixodes persulcatus);
  • Far Eastern subtype (formerly Russian Spring Summer encephalitis virus, RSSEV; principal tick vector: Ixodes persulcatus).[1]

The reference strain is the Sofjin strain.[2]

Evolution[edit]

The ancestor of the extant strains appears to have separated into several clades approximately 2750 years ago.[3] The Siberian and Far Eastern subtypes diverged about 2250 years ago.

A second analysis suggests an earlier date of evolution (3300 years ago) with a rapid increase in the number of strains starting ~300 years ago.[4]

This virus has been transmitted at least three times into Japan between 260–430 years ago.[5][6]

The strains circulating in Latvia appear to have originated from both Russia and Western Europe[7] while those in Estonia appear to have originated in Russia.[8] The Lithuanian strains appear to be related to those from Western Europe.[9]

References[edit]

  1. ^ Goodman, Jesse L.; Dennis, David T. & Sonenshine, Daniel E. (2005). "Tick-Borne Encephalitis". Tick-Borne Diseases of Humans. Washington, DC: ASM Press. p. 151. ISBN 1-55581-238-4. 
  2. ^ Kovalev SY, Mukhacheva TA, Kokorev VS, Belyaeva IV (April 2012). "Tick-borne encephalitis virus: reference strain Sofjin and problem of its authenticity". Virus Genes 44 (2): 217–24. doi:10.1007/s11262-011-0690-9. PMID 22095094. 
  3. ^ Subbotina EL, Loktev VB (2012). "Molecular evolution of the tick-borne encephalitis and Powassan viruses". Mol. Biol. 46 (1): 75–84. doi:10.1134/S0026893311060148. PMID 22642104. 
  4. ^ Uzcátegui NY, Sironen T, Golovljova I, et al. (April 2012). "Rate of evolution and molecular epidemiology of tick-borne encephalitis virus in Europe, including two isolations from the same focus 44 years apart". J. Gen. Virol. 93 (Pt 4): 786–96. doi:10.1099/vir.0.035766-0. PMID 22205716. 
  5. ^ Suzuki Y (June 2007). "Multiple transmissions of tick-borne encephalitis virus between Japan and Russia". Genes Genet. Syst. 82 (3): 187–95. doi:10.1266/ggs.82.187. PMID 17660689. 
  6. ^ Takashima I, Hayasaka D, Goto A, Kariwa H, Mizutani T (February 2001). "Epidemiology of tick-borne encephalitis (TBE) and phylogenetic analysis of TBE viruses in Japan and Far Eastern Russia". Jpn. J. Infect. Dis. 54 (1): 1–11. PMID 11326122. 
  7. ^ Lundkvist k, Vene S, Golovljova I; et al. (December 2001). "Characterization of tick-borne encephalitis virus from Latvia: evidence for co-circulation of three distinct subtypes". J. Med. Virol. 65 (4): 730–5. doi:10.1002/jmv.2097. PMID 11745938. 
  8. ^ Golovljova I, Vene S, Sjölander KB, Vasilenko V, Plyusnin A, Lundkvist A (December 2004). "Characterization of tick-borne encephalitis virus from Estonia". J. Med. Virol. 74 (4): 580–8. doi:10.1002/jmv.20224. PMID 15484275. 
  9. ^ Mickiené A, Vene S, Golovljova I, et al. (December 2001). "Tick-borne encephalitis virus in Lithuania". Eur. J. Clin. Microbiol. Infect. Dis. 20 (12): 886–8. doi:10.1007/s10096-001-0637-5. PMID 11837641. 

External links[edit]



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Tick-borne_encephalitis_virus — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

108 news items

 
Journal of Virology
Thu, 28 Jan 2016 08:30:00 -0800

Studies evaluating the immunogenicity of two pediatric tick-borne encephalitis virus (TBEV) vaccines have reported contradictory results. These vaccines are based on two different strains of the European TBEV subtype: FSME-Immun Junior is based on the ...
 
GenomeWeb
Fri, 05 Feb 2016 19:11:15 -0800

... developed for the Luminex LX200 or the MagPix platforms, is a multiplex bead-based assay that can discriminate Zika as well as all four types of dengue, Chikungunya, yellow fever, West Nile virus, Plasmodium falciparum, and tick-borne encephalitis ...
 
GenomeWeb
Fri, 05 Feb 2016 13:39:48 -0800

... developed for the Luminex LX200 or the MagPix platforms, is a multiplex bead-based assay that can discriminate Zika as well as all four types of dengue, Chikungunya, yellow fever, West Nile virus, Plasmodium falciparum, and tick-borne encephalitis ...

Fox News

Fox News
Fri, 29 Jan 2016 09:15:00 -0800

... virus and chikungunya, sold its early-stage dengue vaccine candidate to Merck & Co Inc in 2010. It also has a tick-borne encephalitis virus vaccine in the pre-clinical stage, funded by a grant from the infectious disease arm of the National ...

NanoNews (blog)

NanoNews (blog)
Thu, 11 Feb 2016 00:37:30 -0800

Symptoms of infection may include fever, joint pain, itching, rash, conjunctivitis or red eyes, headache, muscle pain and eye pain. And it wasn't until November that a Rio de Janeiro laboratory made a link between the virus and microcephaly, which can ...

NanoNews (blog)

NanoNews (blog)
Mon, 08 Feb 2016 11:18:07 -0800

It also has a tick-borne encephalitis virus vaccine in the pre-clinical stage, funded by a grant from the infectious disease arm of the National Institutes of Health. While anemic ticket sales had already been disappointing organizers, concerns are ...

Daily Mail

Daily Mail
Fri, 29 Jan 2016 07:09:48 -0800

A vaccine for the Zika virus, which has been linked to severe birth defects in thousands of infants, could be ready for emergency use before year-end, one of its lead developers said - a timetable well ahead of estimates by U.S. officials. Canadian ...

YLE News

YLE News
Sat, 16 May 2015 09:41:15 -0700

“When the TBE cases came to light, researchers collected tick samples in the archipelago. The viruses they carried were isolated and analysed, and it became clear that it was the Siberian subtype of the tick-borne encephalitis virus that we were ...
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