| | | Antigen of strain 75V-807 was tested by CF with immune mouse ascitic fluids (MIAF) representing viruses of the following serogroups: A, B, C, Bunyamwera, vesicular stomatitis, Capim, Guama, Patois, Simbu, Turlock, Gamboa, Minatitlan, California, and Hart Park. They only reaction was with Group C grouping MIAF. Subsequent tests were performed by serum dilution plaque-reduction neutrali- zation with the following results: | | | | | | 75V-807 |
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| Virus or MIAF | Homologous | Virus | MIAF |
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| | a - = <20 | | 75V-807 | 1280 | 1280 | 1280 | | Ossa | 320 | 20 | 320 | | Gumbo Limbo | 160 | - a | 40 | | Restan | >5120 | 320 | - | | Murutucu | >640 | 40 | - | | Madrid | 320 | - | - | | Nepuyo | 80 | - | - | | Apeu | 160 | 40 | - | | Caraparu | 160 | 40 | - | | Marituba | 320 | 40 | - | | Itaqui | >640 | - | - | | Oriboca | >640 | 20 | - |
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