Abstract
Studies have been made of the heterogeneity of infectivity and CFA in Teschen virus (Talfan strain) suspensions. Most of the infectivity was contained in two components of densities 1.46 gm./ml. and 1.35 gm./ml. The physical, chemical and immunological properties of these components have been compared. It was possible, however, to convert a large proportion of “1.46” component to “1.35” component by treating the “1.46” component with sodium dodecyl sulphate. This would indicate that the “1.46” component was a complex formed between the infective particles and cellular debris.
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