Physicochemical
RNA, Double Strand
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(S)
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(S)
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(S)
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| Stability of Infectivity (effects) |
Labile at pH 3.0; stable at pH 6.4
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20%
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4.8 dex
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5.5 dex
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5%
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5.8 dex
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5.5 dex
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0.1%
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6.2 dex
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5.8 dex
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Sens. to trypsin, resistant to repeated freeze-thaw (4,6)
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| Virion Morphology |
Spherical
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55 nm (9)
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55 (9) nmnm
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range 50-60 nmnm
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Negative contrast
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Pseudo-envelope (9)
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Cubic T=3 (9); Capsomere=32 (9)
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| Morphogenesis |
Cytoplasm (9)
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Budding from cell membrane, intracytoplasmic viral matrices (9)
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Cytoplasm, extra-cellular space (9)
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Tubular structures in cytoplasm (9)
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| Hemagglutination |
No
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Inf. bovine kidney cell cult. fl. Acetone-ether ext. SMB
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Many*
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7.2
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37dC, 22dC, 4dC
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* Cattle, horse, sheep, goat, guinea pig, mouse and chicken erythrocytes
tested
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NT, CF
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* Cattle, horse, sheep, goat, guinea pig, mouse and chicken erythrocytes
tested
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