Physicochemical
RNA, Double Strand
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(S)
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RNA-RNA homology relationship with BLU, not with reovirus (8); dsRNA has at least 10 segments (28).
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(S)
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(S)
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| Stability of Infectivity (effects) |
Sensitive to pH 3.0; resis. to trypsin (6)
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20%
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7.75 dex
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7.5 dex (9)
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0.1%
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3.5 dex
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3.5 dex (9)
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NaCl, CaCl2, MgCl2 inactivate virus at -22C and -30C, not at - 70C (19)
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| Virion Morphology |
Icosahedral shape (17)
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50 nm (5)
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nm
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nm
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Ultrafiltration, ultracentrifugation (5)
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Pseudoenvelopes may be present (21)
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Capsid diameter 71 (18); 32 capsomeres (17)
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| Morphogenesis |
Intranuclear and intracytoplasmic filaments (18)
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| Hemagglutination |
Yes (10)
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SMB ext. by sucrose-acetone
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Horse
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6.4
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37dC
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HI, CF, NT; direct, indirect IFA (group specific)
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