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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                50%
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                0 dex
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                4.0 dex
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                1:1000
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                0 dex
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                4.0 dex
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            | Virion Morphology | 
        
        
            
                 
                Spherical; bunyavirus-like (2)
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                100 nm
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                nm
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                nm
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                Electron microscopy
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            | Morphogenesis | 
        
        
            
                 
                
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            | Hemagglutination | 
        
        
            
                 
                Yes
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                SMB ext. by sucrose-acetone
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                Goose
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                5.5-7.0
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                5.9
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                +4dC, +22dC
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                +22dC
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                *  Type of nucleic acid determined by sensitivity of the virus to
    5-bromo-2-deoxyuridine
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                CF
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                *  Type of nucleic acid determined by sensitivity of the virus to
    5-bromo-2-deoxyuridine
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            |   |