Physicochemical 
                
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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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                1:1000
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                Inactivated (3)
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                Sensitive to trypsin, chymotrypsin and papain (34)
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            | Virion Morphology | 
        
        
            
                 
                
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                18-26 nm
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                nm
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                nm
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                Gradocol filtration (33)
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            | Morphogenesis | 
        
        
            
                 
                
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            | Hemagglutination | 
        
        
            
                 
                Yes
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                SMB ext. by acetone-ether; sucrose-acetone; alkaline aqueous
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                Goose
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                6.1-6.8
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                6.4
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                HA also produced in supernatant fluid of infected BHK cells,
              using 1 day-old chick erythrocytes (28).
*  NT antibody developed in inoculated rhesus (Macaca mulatta) monkey.
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                HI, CF, and NT
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                HA also produced in supernatant fluid of infected BHK cells,
              using 1 day-old chick erythrocytes (28).
*  NT antibody developed in inoculated rhesus (Macaca mulatta) monkey.
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