Abstract
Experiments on inbred animals showed that short-term exposure in cold water significantly modified structural and functional parameters of the immune system at different levels of its organization, from bone marrow hemopoiesis to effector stage of the immune response to antigen. The thermal factor caused changes in nonspecific and specific mechanisms of the immune system. Hypothermal exposure (7-9 degrees C, 5 sec) increased the thymic index and bone marrow lymphocyte count, reduced absorption capacity and stimulated metabolic activity of phagocytes, stimulated cell-mediated and suppressed humoral immunity. Contrast exposure in cold and hot water (7-9 degrees C, 5 sec/40-42 degrees C, 30 sec) increased monocyte count in bone marrow and reduced it in the their peripheral blood, reduced metabolic activity of phagocytes, stimulated cell-mediated and suppressed humoral immunity. These data demonstrate physiological mechanisms of interactions between the thermoregulatory and immune systems.
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