Abstract
Summary
Suspensions of lymphocytes were derived from the thymus and spleen of rabbits and from normal and lymphocytic leukemic blood of patients. Radiation with 1000r and incubation at 37°C, caused the death of the lymphocytes after a latent period of 3 hours. Radiation with as little as 50r had a minimal cytocidal effect on thymic lymphocytes. In contrast, granulocytes in suspensions from the spleen and bone marrow of rabbits and the leukocytes of myelogenous leukemic blood of patients were resistant to radiation with 1000r. It appeared that radiation and incubation had a delayed cytocidal action on lymphocytes but not on granulocytes in vitro.
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