FIG. 2.   Inactivation of CRPV by SDS and comparison with inactivation by N-9. Aliquots of CRPV (10² dilution) were mixed with concentrated SDS or concentrated N-9 to a final concentration of 0.05% as described in Materials and Methods. Untreated virus () or treated virus () was inoculated at two sites each per animal, and papilloma production was measured as the GMD of visible lesions on the indicated days. (a) Comparison of results for 10 SDS-treated and 10 untreated virus inoculation sites. (b) Comparison of 10 N-9-treated and 10 untreated virus inoculation sites. Papilloma production was measured as the average GMD of visible lesions on the indicated days.