| CF tests | Homologous titer 256/64 | BA 365 gives negative results with the following sera from mice: | |
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| Group A: | chickungunya, o'nyong nyong, Semliki Forest virus, Sindbis, Middelburg, Ndumu. | Group B: | Ntaya, Wesselsbron, Usutu, West Nile, Dakar bat, Uganda S, yellow fever, Zika, Spondweni, Bukalasa bat, Entebbe bat. | Group Bunyamwera: | Germiston, Ilesha, Shokwe. | Group Bwamba: | Bwamba, Pongola. | Group Simbu: | Simbu, Ingwavuma. | Others: | Chenuda, Nyamanini, Thogoto, Wad Medani, Bandia, Lebombo, Mossuril Nyando, Olifantsvlei, Tanga, Witwatersrand, Tataguine, Lagos bat, Quaranfil. |
| However BA 365 is related to Yaba 1 as shown by following cross CF tests [3] : | | | Turlock | Umbre | Yaba 1 | BA 365 | |
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Antigens | Ascitic fluid | Serum | Serum | Ascitic fluid | |
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| Turlock | 64/256 | 64/64 | 16/64 | 4/256 | | Umbre | 8/16 | 128/64 | 8/4 | 2/4 | | Yaba 1 | 8/64 | 16/64 | 256/256 | 16/1024 | | BA 365 | 4/64 | 16/64 | 256/64 | 16/256 | |
| On further testing, M'Poko was found to be indistinguishable from Yaba-1 by cross CF and NT [5] . | Neutralization data shown on the Lednice virus registration card indicate that Yaba 1 and M'Poko viruses manifest two-way differences [7] . | |
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