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A number of nonliving mycobacterial preparations were tested in vivo for their capacity to generate various relevant parameters of cellular immunity. All preparations tested had some detectable activity in raising resistance to challenge with Mycobacterium tuberculosis or with Listeria monocytogenes and in conferring the ability to mount a delayed-type hypersensitivity response to tuberculin. This report presents the first evidence, however, that none of these preparations were able to generate protective T cells capable of adoptive immunization against virulent tuberculosis. These data are discussed in terms of the use of these preparations in generating M. tuberculosis-reactive T-cell lines and the application of these lines in the continuing search for an improved vaccine against tuberculosis.

infection and immunity

Induction of nonspecific acquired resistance and delayed-type hypersensitivity, but not specific acquired resistance in mice inoculated with killed mycobacterial vaccines