Two recently isolated viruses, Germiston from South Africa and Ilesha from West Africa, have been compared immunologically with members of the Bunyamwera group of viruses by both complement-fixation and hemagglutination-inhibition tests. It has been shown that both viruses belong to the group but are nonetheless sufficiently distinguishable from the other members to be consided as separate viruses.
Hemagglutinins were prepared for both agents, a fact extending the knowledge of cross hemagglutination in the group.
Germiston virus was found to be closer to Bunyavera virus HI test than to others members of the group, but was sharply set apart from the group as a whole in CF tests.
Ilesha virus was found to be closer to Cache Valley virus in HI tests, and was closely related to both Cache Valley And Bunyamwera virusee in CF tests.