北京地区牛病毒性腹泻病毒流行传播的原因分析

摘要

在对北京地区20个奶牛群进行抗体水平检测和全群抗原筛查的基础上,将牛群中牛病毒性腹泻病毒流行状况同牛群在3年内是否引入过动物进行相关性比较.结果显示,20个牛群中,引入过动物的8个牛群中后备牛群血清抗体平均水平为80.0％,抗原筛查的总体阳性率为0.61％；未引入过动物的12个牛群中后备牛血清抗体平均水平为65.5％,抗原筛查的总体阳性率为0.15％,两组数据之间差异极显著,表明牛群在3年内是否引进过动物对牛群持续感染牛的分布影响极显著,动物引进可能是造成BVDV在北京地区流行传播的主要原因之一.%Based on the detection of the antibody level and the whole group antigen screening in 20 dairy herds in Beijing area,the prevalence of bovine viral diarrhea virus in herds was compared with the introduction of animal into herds in 3 years.Within the 20 herds,the 8 herds that had introduced animal from other herds have an average serum antibody level of 80％ in replacement group,the positive rate of antigen screening is 0.61％; the average serum antibody level of replacement group in 12 herds that had not introduced animal was 65.5％,the overall positive rate of antigen screening is 0.15％,the difference between two sets of data is extremely significant.The results show,whether introduced animals into a herd within 3 years influence the distribution of PI animals in herds significantly,and the introduction of animal may be one of the main causes of BVDV epidemic transmission in Beijing area