[Immunological studies demonstrating the enhancing effect of aristolochic acid on immunoreactions (author's transl)].

In experimental studies it was shown that aristolochic acid is able to ameliorate or to stimulate immunoreactions. This was studied in vivo with cutaneous delayed hypersensitivity reactions and by measurement of the gamma-globulin formation of treated rabbits; the in vitro system used was the macrophage migration test.