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.
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**Eastern EEV
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**Western EEV
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====Viral Genus====
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**Venezuelan EEV
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Alphaviruses are single-stranded, linear, positive-sense RNA viruses, 60-70nm in diameter.
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====Important Serotypes====
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During equine and human epidemics of encephalitis in the Western Hemisphere, the most frequently isolated alphaviruses have included: