【摘要】 对鸡传染性法氏囊病弱毒苗Ｂｕｒｓｉｎｅ－２，Ｄ_７８，ＴＡＤ进行复制，免疫２１日龄雏鸡，１４天后ＡＧＤ抗体阳性率达９０％～１００％，用从本地分离的Ｓ_{－９３０２}强毒１：１０囊乳剂０．２ｍｌ／只滴鼻、点眼、口服攻毒，结果对照组１００％发病，５０％死亡，试验组１００％保护，获得较好的免疫效果。更多还原

【Abstract】 Infectious Bursal Disease （IBD）Attenuated Vaccine B_-2,D₇₈ and TAD were du-plicated and vaccinated in 21day old chick, after 14 days the positive rate of AGP antibodywas 90%～100%. In addition,A bursal emulsion(S_-9302)produced by virulent virus was usedin vaccinated and non-vaccinated chicks. the bursal emulsion was dropped in eyes,nostril andper. os with a dosage of 0.2ml（10%）per chick. All of the non-vaccinated animals sufferedfrom IBD and half of them died,While no chicks in vaccinated group died.更多还原