【摘要】 分别以７种鸡ＭＤ疫苗免疫ＳＰＦ鸡和狼山鸡，用琼脂扩散试验（ＡＧＰ）检查鸡群ＭＤＶ强毒攻击后不同时期的羽囊抗原，结果表明，免疫组鸡羽囊排毒高峰推迟，排毒率下降，排毒高峰维持时间短，不同疫苗免疫不同品种鸡后排毒情况有差异，ＣＶＩ９８８和两种二价苗效果优于ＨＶＴ苗。更多还原

【Abstract】 After immunized with MD vaccines and challenged with virulent strain of MDV,the chicken of each group were detected of MDV antigens in the feather follicles by agar-gel procipitation test(AGPT) The results showed that the shedding of the challenged virus delayed and reduced in chicken inoculated with vaccines than those inoculated with virulent MDV only The shedding of challenged virus is different between SPF chicken and Langshan chicken flocks after inoculated with the same vaccine The immunal protection role of CVI988 and two kinds of bivalent vaccines is better than HVT Fc126更多还原