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为了对牦牛衣原体灭活疫苗免疫保护性做一评价,本试验在青海省2个示范县贵南和海晏县筛选怀孕母牛作为试验动物,试验组牦牛38头,对照组15头。试验组牦牛免疫后第21天进行攻毒,攻毒剂量为1:1(14头),1:10(12头),1:100(12头);对照组0d直接进行攻毒,攻毒剂量为1:1(5头),1:10(5头),1:100(5头),结果显示:试验组牦牛都未发生流产,保护率为100%;对照组流产11头,流产率73.33%。由此可见,该疫苗免疫怀孕牦牛后具有较高的免疫保护性。
In order to evaluate the immunoprotection of chlamydia inactivated vaccine, we tested pregnant cows in Guinan and Haiyan counties of 2 pilot counties in Qinghai Province, with 38 yaks and 15 control subjects. In the experimental group, the yak was challenged on the 21st day after immunization. The challenge doses were 1: 1 (1 in 1), 1 in 10 (12), 1 in 100 (12 in each) The results showed that all the yaks in the experimental group did not have abortion, the protection rate was 100%. In the control group, there were 11 abortions and miscarriage Rate of 73.33%. Thus, the vaccine immunized pregnant yak with high immunity.