摘要
对鸡新城疫病毒(NDV)V4株的毒价、血凝(HA)稳定性和致病指数进行了研究,结果显示NDVV4株的毒价(EID)为10-8.3~10-10.1/0.1mL,25℃存放28d、37℃存放12d及反复冻融7次HA滴度不变,其1日龄雏鸡脑内接种、6周龄鸡静脉接种发病指数和鸡胚平均致死时间分别为:ICPI=0.00,IVPI=0.00。
Researches have been conducted as to determine the virus titers, HA stability and pathogenic index of Newcastale disease virus (NDV) V4 strain. It showed that the virus titers of NDV V4 strain are between 10 8.3 EID 50 /0.1 mL and 10 10.1 EID 50 /0.1 mL. Its HA is stable for 28 days at 25℃ or for 12 days at 37℃ or freezing and thawing 7 times. And its ICPI,IVPI and MDT are 0.00 , 0.00 and more than 150 hours, respectively.
基金
浙江省教委1994年重大科研项目