Tick-borne encephalitis virus

Paul G. Auwaerter, M.D.

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MICROBIOLOGY

Tick-borne encephalitis virus (TBEV): flavivirus member, single-strand, positive-sense RNA virus.
- Three subtypes:
  - European (Western)
  - Siberian
  - Far Eastern (historically termed Russian Spring-Summer encephalitis virus)
- Related viruses include the Omsk hemorrhagic fever virus (Russia/Siberia), Kyasanur Forest disease virus (India), Alkhurma virus (Kingdom of Saudi Arabia), and Louping ill virus (UK), Powassan virus (U.S.)
TBEV
- Vector: Ixodidae (hard-bodied) ticks
  - European: I. ricinus (castor bean or sheep tick)
  - Far Eastern, Siberian: I. persulcatus (taiga tick)
  - Dermacentor reticulatus (ornate cow/meadow/ornate dog/marsh tick): vector in some TBEV.
- Reservoir: ticks, rodents, and other small mammals

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MICROBIOLOGY

Tick-borne encephalitis virus (TBEV): flavivirus member, single-strand, positive-sense RNA virus.
- Three subtypes:
  - European (Western)
  - Siberian
  - Far Eastern (historically termed Russian Spring-Summer encephalitis virus)
- Related viruses include the Omsk hemorrhagic fever virus (Russia/Siberia), Kyasanur Forest disease virus (India), Alkhurma virus (Kingdom of Saudi Arabia), and Louping ill virus (UK), Powassan virus (U.S.)
TBEV
- Vector: Ixodidae (hard-bodied) ticks
  - European: I. ricinus (castor bean or sheep tick)
  - Far Eastern, Siberian: I. persulcatus (taiga tick)
  - Dermacentor reticulatus (ornate cow/meadow/ornate dog/marsh tick): vector in some TBEV.
- Reservoir: ticks, rodents, and other small mammals

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