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。
2
It is certainty that cross-reactions exist between WNV and JEV, whether cross-protection exists between them need to determine with neutralizationtest.
WNV与JEV存在一定交叉反应，但是否有交叉保护作用则需要中和试验等进一步证实。
3
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-neutralizationtest.