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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.
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KeepMEcurrent.com
Wed, 12 Nov 2014 09:26:15 -0800

In fact, the new tick-borne encephalitis virus led to the death of a highly respected artist in the Midcoast just last year, Rand said. In addition to tick-borne illnesses, Rand's lab is also tracking mosquitoes to monitor the distribution of Eastern ...

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Sun, 02 Jun 2013 01:40:31 -0700

Tick-borne encephalitis is present in many parts of Europe, the former Soviet Union, and Asia. Three virus sub-types include: European or Western tick-borne encephalitis virus, Siberian tick-borne encephalitis virus, and Russian Far Eastern tick-borne ...

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Tue, 24 Jun 2014 08:11:15 -0700

... of dengue fever infection, with a severe outbreak occurring in 2010. Dengue fever virus is an RNA virus in the Flaviviridae family and Flavivirus genus. Other members of the genus include West Nile virus, yellow fever virus and tick-borne ...
 
ABC News
Fri, 29 Mar 2013 10:22:11 -0700

In fact, this was the only reported such case of this disease (Tick-Borne Encephalitis Virus) in all of China." "We remain very saddened by this student's illness, and we continue to hope for improvements to her health," the statement concluded. Munn ...
 
Medscape
Mon, 15 Mar 2010 00:00:00 -0700

Ticks can transmit a variety of viruses, bacteria or parasites that can cause serious infections or conditions in humans and animals. While tick-borne diseases are becoming an increasing and serious problem in Europe, tick-borne diseases are also ...
 
Phys.Org
Thu, 21 Mar 2013 04:43:11 -0700

The three-dimensional structure of influenza virus from electron tomography. Credit: Wikicommons, courtesy of NIH. (Phys.org) —Viruses are biological pirates, invading cells and hijacking their machinery to reproduce and infect again. Research at ...
 
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Thu, 01 Aug 2013 14:04:05 -0700

Dengue virus is a member of the Flaviviridae family, which are enveloped, positive-sense RNA viruses whose human pathogens also include West Nile virus, yellow fever virus, Japanese encephalitis virus and tick-borne encephalitis virus, among others.
 
Kyiv Post
Thu, 09 Jun 2011 14:19:43 -0700

Summer is with us and I have already collected my first tick whilst working in the garden. It just fell onto the back of my neck from a beautiful silver birch tree I was standing under, thinking how magnificent the village looked in the morning light ...
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