Equine Encephalitis Virus

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Viral Family

Members of the Togaviridae are small, lipid- and protein-enveloped RNA viruses. Within this family are disease-causing arboviruses (insect-borne virsuses) of the Alphavirus genus.

Viral Genus

Alphaviruses are single-stranded, linear, positive-sense RNA viruses, 60-70nm in diameter.

Important Serotypes

During equine and human epidemics of encephalitis in the Western Hemisphere, the most frequently isolated alphaviruses have included:

  • Eastern Equine Encephalitis virus (EEV)
  • Western EEV
  • Venezuelan EEV

Diseases

Equine viral encephalomyelitides