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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1:400
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<2 dex
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5.2 dex
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| Virion Morphology |
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40-50 nm
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nm
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nm
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Electron microscopy (5)
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Envelope present
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30nm nucleocapsid morphologically
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| Morphogenesis |
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| Hemagglutination |
Yes
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SMB, carcass, blood ext. by acetone-ether or sucrose-acetone +
prot. tr.
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Goose
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6.0-6.4
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6.4
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Not tested
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37dC used routinely
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Good antigens obtained by sucrose-acetone ext.of whole blood col.
48 hours after ip inoc. of SM with 4 dex LD50
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HI, CF, NT
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Good antigens obtained by sucrose-acetone ext.of whole blood col.
48 hours after ip inoc. of SM with 4 dex LD50
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