牛环形泰勒焦虫裂殖体胶冻细胞苗应用效果观察

Effect of Gelatin Protected Schizont CellVaccine against Theileria annulata

河南省桐柏县是牛环形泰勒虫病流行的多发区 ,对养牛业危害十分严重 ,1 985年该县从宁夏农林科学院畜牧兽医研究所引进“虫苗”2万头份 ,在区域试验的基础上在全县 1 6个乡 (镇 )进行了大面积防疫注射 ,经年终统计表明 :虫苗安全性 1 0 0 % ,注苗 1 5 0 0 0头 (其中有水牛 45 0 0头 ) ,发病 3头 ,发病率 0 .0 2 % ;未注苗 36 0 0 0头 ,发病 2 0 6 0头 ,发病率 5 .7% ,实际有效保护率达 99.98% 。

Tongbai County of Henan Province is one of the high epidemic areas of bovine theileriosis.In 1985,gelatin protected schizont cell vaccine for 20,000 cattle was introduced.From Ningxia Institute of Animal Husbandry and Veterinary Medicine against Theileria annulata.On the basis of regional tests,the vaccine was applied throughout 16 townships of the County.The annual investigation showed that the safety of the vaccine was 100%.Among the 15,000 cattle (including 4,500 water buffaloes) inoculated with the vaccine,only 3 cattle suffered from theileriosis.The incident rate was 0.02%.However of the 3600 un inoculated cattle,2060 heads suffered from the disease.The incident rate was 5.7%.The effective protection reached 99.98% with a significant social and economic effect.