绵羊包虫病基因工程疫苗(Eg95)免疫试验

The prophylactic effect of the genetically engineering vaccine Eg95 on hydatid disease of sheep

目的验证绵羊包虫病基因工程疫苗(Eg95)对新疆羊源棘球蚴病预防效果。方法应用新西兰农牧科学院沃勒斯维尔动物研究中心提供的绵羊包虫病基因工程疫苗(Eg95),对新生新疆细毛羊、巴音布鲁克羊、山羊羔羊进行二免、三免、四免,以间接ELISA法作血清抗体动态检测,在免疫42d、180d、365d、730d进行人工感染,于感染后180d剖解试验羊;试验羊二免后在包虫病的高发区放牧饲养180d、365d730d后剖解试验羊,检查免疫组与对照组羊的肝脏和肺脏荷囊数量,统计保护率(减囊率)。结果1.Eg95有体征反应,属于正常疫苗反应;2.免疫组与对照组血清IgG的OD值之比?2;3.二免后42d,人工感染的保护率:新疆细毛羊90.5%,山羊100%;4.二免后180d,人工感染的保护率:新疆细毛羊94.6%,山羊82.2%;自然感染的保护率:新疆细毛羊88.1%,巴音布鲁克羊83.6%。5.二免后365d,人工感染的保护率:新疆细毛羊97.4%;自然感染的保护率:新疆细毛羊83.6%,巴音布鲁克羊83.3%。6.二免后730d,人工感染的保护率:新疆细毛羊86.%;自然感染的保护率:87.1%;7.三免后180d,人工感染的保护率:新疆细毛羊99.2%。8.三免后365d,人工感染的保护率:新疆细毛羊95.6%,自然感染的保护率95.1%。9.四免后365d,人工感染的保护率:新疆细毛羊97.7%,自然感染的保护率95.5%。结论Eg95对新疆羊源棘球蚴病具有预防作用,免疫程序为新生羊羔初次2次,间隔期1个月(或4周),其后每年加强一次。

To confirm the prophylactic effect of the genetically engineering vaccine Eg95 on hydatid disease of sheep from Xinjiang ,the genetically engineering vaccine Eg95, supplied by Wallaceville Animal Research Center,New Zealand,was used to immunize the Xinjiang Merino lambs,Bayinbuluke lambs and lamb kids. Then,the dynamic examination on the levels of serum antibodies was observed by means of ELISA assay and the immunized sheep and goats were challenged with eggs of Echinococcus granunosa at 42,180,365 or 730 d...