| CF test. Homologous titer = 64/16. BA 490 gave negative results with the following sera from mice: | |
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| Group A; | chikungunya, o'nyong-nyong, Semliki Forest, Sindbis, Middelburg, Ndumu. | Group B; | Ntaya, Wesselsbron, Usutu, West Nile, Dakar bat, Zika, Spondweni, Bukalasa bat, Entebbe bat. | Bunyamwera group; | Germiston, Ilesha, Olifantsvlei, Shokwe. | Bwamba group; | Bwamba, Pongola. | Simbu group; | Simbu, Ingwavuma. | California group; | Lumbo. | Nyando group; | Nyando. | Mossuril group; | Mossuril. | Kemerovo group; | Chenuda, Wad Medani. | Quaranfil group; | Quaranfil. | Qalyub group; | Bandia. | Miscellany; | Nyamanini, Thogoto, Lebombo, Tanga, Witwatersrand, Tataguine, Lagos bat. |
| BA 490 gave positive results with sera for Uganda S and yellow fever viruses. | | | Bouboui Antigen/Virus | Bouboui Ascitic Fluid |
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Antibody or Antigens/ | CF | NT | CF | NT |
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Viruses | Ht/Ho | Ratio | Ht/Ho | Ht/Ho | Ratio | Ht/Ho |
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| NT: LNI in dex | | | | | | | | Uganda S | 16/64 | 1/4 | 3.3/4.4 | 32/256 | 1/8 | 2.0/4.1 | Yellow fever | 16/256 | 1/16 | 2.2/>5.0 | 8/256 | 1/32 | <1.7/3.9 |
| Results indicate that BA 490 is an hitherto undescribed virus strain related to Uganda S. | |
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