Comparison of the shock-inducing effect of anti-mouse anti-thymocyte horse serum and normal horse serum. I. Experiments with three-week-old mice.

Sera administered intravenously to mice hypersensitized with normal horse serum and with horse serum of anti-lymphocytic activity, produce reactions that differ considerably in mice treated in different ways. The experiments of the authors indicate that the anaphylactogenic effect of ATS is substantially stronger than that or normal horse serum. The paper discusses the clinical and theoretical conclusions to be drawn from this phenomenon observed in the experiments.