DNA content in purkinje cells of the cerebellum of rats spontaneously infected with Kilham virus

The DNA content in the Purkinje cells of the cerebellum of rats spontaneously infected with Kilham virus and of rats which were not carriers of the injection was determined cytospectrophotometrically in preparations stained by the Feulgen method. The frequency of discovery of cells with hyperdiploid nuclei was the same in the two groups. It is concluded that a nonmultiple increase in the DNA content in Purkinje cells of the rat cerebellum is evidently not connected with virus infection.