Physicochemical 
                RNA
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                (S)
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                (S)
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                (S)
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            | Stability of Infectivity (effects) | 
        
        
            
                 
                
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                1:2
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                3.0 dex
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                >5.0 dex
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                1:1000
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                2.0 dex
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                5.0 dex
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            | Virion Morphology | 
        
        
            
                 
                
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                nm
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                50-60 nmnm
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                Electron microscopy (ultrathin section)
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            | Morphogenesis | 
        
        
            
                 
                
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            | Hemagglutination | 
        
        
            
                 
                No
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                Duck embryo cell culture; SMB ext. by sucrose-acetone
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                Goose
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                5.8-7.0
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    *  Although it has been demonstrated that Llano Seco virus is antigenically
 related to Umatilla virus, its antigenic relationship to other established
 orbivirus serogroups is uncertain.  Further serological studies are needed to
 clarify i
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                CF, NT, IFA (broadly reacting)
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    *  Although it has been demonstrated that Llano Seco virus is antigenically
 related to Umatilla virus, its antigenic relationship to other established
 orbivirus serogroups is uncertain.  Further serological studies are needed to
 clarify i
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