Thermal and ultraviolet light inactivation of Mycobacterium africanum

Mycobacterium africanum Yaoundé and Rwanda were more heat-resistant than the tubercle bacilli. The ultraviolet susceptibilities of M. africanum strains were within the range usually found in the mycobacteria (e-1 doses), however marked differences were found in the intersept numbers of the Yaounde and the Dakar types.