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| It was screened by CF at 1/5 and 1/40 against hyperimmune antisera to the following African arboviruses without finding any significant relationship: |
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| | Bunyamwera | Ingwavuma | Lebombo | | Germiston | Simbu | Lumbo | | Ilesha | African horsesickness | Mossuril | | Olifantsvlei | Bluetongue | Orungo | | Shokwe | Chenuda | Nairobi sheep disease | | Bwamba | Dakar | Nyamanini | | Pongola | Lagos bat | Nyando | | Quaranfil | Tanga | Tete | | Thogoto | Wad Medani | Witwatersrand |
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| It was also negative with hyperimmune Herpes simmplex antiserum. |
| Hyperimmune antiserum (V 3011) has been screened at 1/10 by HI with negative results against the following antigens: |
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| | Group A | chikungunya, Semliki forest virus, Sindbis | | Group B | yellow fever, West Nile, Zika, Banzi | | Bunyamwera | (Aedes '43) |
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| Casals [10] has shown 3 strains of Congo virus (Congo 3010, Uganda K2/61, Pakistan JD 206) to be atnigenically indistinguishable from each other and from the Drosdov strain of Crimean hemorrhagic fever (CHF) by CF tests. NT and agar gel precipitin tests confirm this relationship. |
| Hazara virus found to be related to but distinct from Congo virus by NT [20] and C (see HAZ registration). Also related by HI [19] . |
| A low-titered relationship by CF, fluorscent antibody and indirect HA demonstrated between CON and NSD viruses [23] , [24] . SIRACA has decided that these relations are no greater than those used to establish the Bunyamwera Supergroup. The CON and NSD antigenic groups should be kept as two distinct serogroups. |
| Following the above observations, intergroup relationships were demonstrated for members of the above two serogroups as well as for members of the DGK, HUG, QYB and SAK serogroups [30] . |
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