Abstract
Summary
Passive transfer of contact sensitivity in rabbits was demonstrated with peritoneal exudative cells, lymph node cells, alveolar cells, and spleen cells from sensitive animals. Cell-free incubation fluids from these four leukocytic populations were as effective in transferring delayed reactivity as were whole cells. The active material was found to be dialyzable. The results suggest a common mechanism for the delayed-type hypersensitive response in several species.
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