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'''Genus ''Alphavirus'''''
 
'''Genus ''Alphavirus'''''
Single-stranded, linear, positive-sense RNA viruses, 60-70nm in diameter.<ref name="multiple">Bertone, J.J (2010) Viral Encephalitis in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) '''Equine Internal Medicine''' (Third Edition), ''Saunders'', Chapter 12</ref>[[Image:Alphavirus.gif|300px|thumb|right|''' (Surface of an Alphavirus.  This image is a computer-generated model of the surface of an alphavirus derived by cryoelectron microscopy. The spike-like structures on the virion surface are trimers composed of heterodimers of the virion surface glycoproteins E1 and E2. These spikes are used by the virus to attach to susceptible animal cells.  ''Sourced from Wikimedia Commons, Copyright of the Centers for Disease Control and Prevention (CDC) Division of Vector-Borne Infectious Diseases, 2007)'' ''']]
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Single-stranded, linear, positive-sense RNA viruses, 60-70nm in diameter.<ref name="multiple">Bertone, J.J (2010) Viral Encephalitis in Reed, S.M, Bayly, W.M. and Sellon, D.C (2010) '''Equine Internal Medicine''' (Third Edition), ''Saunders'', Chapter 12</ref>[[Image:Alphavirus.gif|300px|thumb|right|''Surface of an Alphavirus'' JoelMills 2007, Wikimedia Commons]]
    
===Important Serotypes===
 
===Important Serotypes===
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