Properties of Alphavirus Genus Alphavirus Chikungunya eastern, Spherical, 70 nm in western, and Venezuelan diameter, nucleocapsid has equine encephalitis viruses, 42 capsomeres Genome Mayaro, O' Nyong-nyong, positive-sense, single- Ross River semliki forest, stranded RNA, 11-12 kb in and sindbis viruses size Envelope. three or Arthropod-borne four major structural (mosquitoes) polypeptides, two glycosylated Replication: cytoplasm. Assembly budding through host cell membranes. All viruses serologically relatedProperties of Alphavirus