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→Important Serotypes
*[[Equine Togaviral Encephalitis|Western EEV]]
*[[Equine Togaviral Encephalitis|Western EEV]]
*[[Equine Togaviral Encephalitis|Venezuelan EEV]]
*[[Equine Togaviral Encephalitis|Venezuelan EEV]]
EEE and WEE are specific and discrete species. There are North and South American antigenic variants of EEE. WEE is a recombinant between an EEE-like virus and a Sindbis-like virus. There are two antigenic subtypes of WEE virus: WEE and Highlands J viruses. Extensive geographical overlap occurs between the various strains which have equivocal differences in antigenic properties and biological behaviour. There are 6 distinct subtypes of VEE virus. Over the last 20 years, large outbreaks of equine encephalitis in the Western Hemisphere have been caused by subtypes IAB, IC and IE. ID and IF variants from Central America and Brazil respectively, type II (Everglades) virus in Florida and types II, IV, V ad VI viruses are considered endemic and are of low pathogenicity for horses under most circumstances.
====Diseases====
====Diseases====