Chromatography of arthropod-borne viruses on calcium phosphate columns.

This is an interim report on the fractionation of arthropod-borne viruses of groups A and B by chromatography on calcium phosphate. The method used provides an excellent, cheap and simple tool for the preparation of stable haemagglutinating and complement-fixing antigens for routine diagnostic and other purposes and for the concentration of such products.In the results reported, viruses of groups A and B have been shown to have two haemagglutinins, one of which is the virus particle. The haemagglutinins are antigenically similar but differ in sedimentation characteristics and in reaction with protamine sulfate. Group B viruses have also been shown to have two complement-fixing antigens with different sedimentation properties; one of these antigens is the virus particle. So far no complement-fixing antigen other than the virus particle has been found with group A viruses.