Allergization under conditions of functioning an inhibitory factor in the organism was studied by the reaction of leukocytolysis with Tsuverkalov's dysenterin and in the reproduction of hypersensitivity of the immediate type on the Schultz-Dale's model. It was shown that in functioning an inhibitory factor in the organism the degree of leukocytolysis reaction with the dysentery allergen decreased in the immunized animals in parallel with the fall in the serum antibody activity. A depression of the activity of macromolecular sensitizing antibodies was also observed.
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