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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