In this test, chickens were fed with bacillus from the healthy chickens'digestive tract, and infected with salmonella pullorum, to observe the difference of growth speed and death rate between the test and the control group. 本研究利用从健康鸡消化道分离的鸡源芽孢杆菌饲喂雏鸡,采用鸡白痢沙门氏菌作为攻毒病原菌,观察试验组与对照组在生长速度及死亡率上的差异。