2017—2020年贵州省羊小反刍兽疫监测

Surveillance of PPR in Sheep in Guizhou Province from 2017 to 2020

为了解贵州省羊小反刍兽疫(peste des petits ruminants,PPR)的免疫及病原感染情况,2017—2020年,在全省累计采集2148个场点的85145份血清学样品,487个场点的24777份病原学样品,分别进行PPR免疫抗体和病毒核酸检测,并对检测结果进行统计分析。结果显示:2017—2020年贵州省PPR平均个体免疫合格率为85.28%,群体合格率为90.18%,个体和群体免疫合格率均呈逐年上升趋势;不同场点、不同区域的个体免疫合格率略有差别,但均达到了农业农村部要求的70%以上的标准;仅2017年在安顺市一商品代养殖场检出病原阳性样品,其他年份和区域均未检出。结果表明,贵州省PPR免疫及防疫效果较好,疫病发生风险较低,为退出PPR强制免疫,实现消灭计划目标奠定了基础。但应继续加强PPR强制免疫、监测,加大羊群调运监管力度,全面提升PPR防控能力。

In order to investigate the immunization status and pathogenic infection of peste des petits ruminants(PPR)in Guizhou Province,a total of 85145 serum samples were randomly collected from 2148 premises as well as 24777 pathogenic samples from 487 premises during 2017 to 2020 for detection of antibodies against PPR and viral nucleic acids,then the test results were summarized and analyzed.The results showed that the average individual immune qualification rate of PPR was 85.28%,and the population qualification rate was 90.18%,both of them were increasing year by year;the individual immune qualification rates were slightly different in various premises and areas,but all reached up to 70%as required by the Ministry of Agriculture and Rural Affairs of the People's Republic of China;positive samples were detected out only in a commercial farm in Anshun City in 2017,and none in other years and regions.It was concluded that PPR was effectively controlled with good immune effect in Guizhou Province,with low risk of outbreak,which laid a foundation for withdrawing from compulsory immunization against PPR,and achieving the goal of eradication.However,the ability for PPR prevention and control should be comprehensively improved through strengthening compulsory immunization and surveillance,as well as intensifying the supervision over movement of sheep.