Graft versus host reaction induced by thymectomized and bursectomized chicken blood.

: Graft versus host reaction in chicken embryos was induced by blood taken from thymectomized or bursectomized or nonoperated donors. The intensity of graft versus host reaction induced by the blood of thymectomized chickens was increased comparing to the reaction induced by blood from control donors. No such result was recorded when the blood donors had the bursa of Fabricius removed.