Seven duck plague virus strains are isolated and identified from seven different invasion districts in Sichuan Province with 9 to 10 day old duck embryo and cross-neutralization test.
用9～ 1 0日龄鸭胚和血清交叉中和试验从四川省七个疑似鸭瘟发病片区分离鉴定了七株鸭瘟病毒。
2
Efficacy test of chicken infection bronchitis bivalent living vaccine was taken with the method of serum crossneutralization. The results showed that it was consistent with that of challenge method.
以血清交叉中和方法进行鸡传染性支气管炎双价活疫苗效力检验，结果与攻毒方法效检结果一致。
3
It is certainty that cross-reactions exist between WNV and JEV, whether cross-protection exists between them need to determine with neutralization test.