为掌握陕西省西安市阎良区及毗邻区域奶山羊传染性胸膜肺炎的流行情况,分析影响该病传播的风险因素,本调查采用二阶段概率抽样方法抽取阎良区全区以及毗邻的临潼区和高陵区的未免疫该病疫苗的血清样品,应用酶联免疫吸附试验进行传染性胸膜肺炎抗体检测.结果显示,该区域群表观流行率(HAP)为25.32%,群真实流行率(HTP)为23.41%(14.07%~32.74%);个体表观流行率(AP)为10.46%(8.81%~12.31%).风险因素分析显示,"中大规模场点"和"病羊未采取隔离、治疗"是羊传染性胸膜肺炎传播的主要风险因素.结果表明,该区域存在一定程度的羊传染性胸膜肺炎流行,养殖场点需要对患病羊及时隔离治疗或淘汰,有条件的场点实施羊传染性胸膜肺炎检测与净化;在饲养规模上升的同时要加强生物安全管理水平,减少潜在风险因素的传播机会.
In order to understand the prevalence of contagious caprine pleuropneumonia in dairy goats and analyze the risk factors influencing its transmission in Yanliang District of Xi'an,Shaanxi,and adjacent regions,this survey employed a two-stage probability sampling method to collect serum samples from Yanliang District,as well as adjacent Lintong and Gaoling districts,where the disease vaccine was not administered.Enzyme-linked immunosorbent assay(ELISA)was used for the detection of contagious caprine pleuropneumonia antibodies.The results showed that the herd apparent prevalence(HAP)in the region was 25.32%,the herd true prevalence(HTP)was 23.41%(14.07%~32.74%),and the apparent prevalence(AP)was 10.46%(8.81%~12.31%).Risk factor analysis indicated that"medium to large-scale farms"and"infected goats not isolated or treated"were the main risk factors for the spread of contagious caprine pleuropneumonia in goats.The findings indicate a certain level of prevalence of contagious pleuropneumonia in the region,and farms should promptly isolate,treat,or cull infected goats.Farms with the necessary conditions should implement testing and purification for contagious pleuropneumonia.As the scale of farming increases,it is essential to enhance the level of biosecurity management and reduce opportunities of potential risk factors spreading.