Demonstration of Nuclear Immunofluorescence in Rift Valley Fever Infected Cells Swanepoel, R. and Blackburn, N. K.,, 34, 557-561 (1977), doi = https://doi.org/10.1099/0022-1317-34-3-557, publicationName = Microbiology Society, issn = 0022-1317, abstract= SUMMARY Eosinophilic intranuclear filaments described previously in Rift Valley Fever infected cells, were shown to fluoresce specifically in an indirect technique with antiserum to the virus. Actinomycin D failed to suppress development of the filaments or replication of the virus., language=, type=