The effects of Ginkgo bilobal L. episperm (G.B) cn immune systems in normal mice were studied. At the po doses of 100 or 200 mg/kg (kg.d) X 7d G.B dereased the thymus and spleen weights of mice
Experimental results indicated that it has inhibiting effct on macrophages of red cells of chicken, the immune specific rosette forming cells and antibodies.
It also supptessed delayed hypersensitivity in footpad or ear of mice induced by SRBC and DNCB.