The results showed that the harvest fluid volume and hemagglutinationtiter of9days duck embryos were better than those of other age embryos.
结果显示，用9日龄鸭胚接种明显优于其他日龄的鸭胚，抗原收获量及血凝价均达到较高水平；
2
Methods: The chicken embryo culture was used to observe the inhibition of MEPS on type A influenza virus by hemagglutination test in terms of hemagglutinationtiter.
方法：采用血凝滴度测定研究MEPS对鸡胚培养甲型流感病毒的抑制作用。
3
Results: According to hemagglutinationtiter, it was proved that most of Radix Isatidis and Folium Isatidis were effective to influenza a virus in 3 aspects: direct, therapeutic and preventive action.