辽宁省一起小反刍兽疫疫情的紧急流行病学调查
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中国兽医现场流行病学培训项目(CFETPV)


Emergency Epidemiological Investigation on an Outbreak of Peste Des Petits Ruminants in Liaoning Province
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    摘要:

    2020年5月15日,辽宁省抚顺市清原县动物疫病预防控制中心报告,该县某养羊户发生山羊急性发病,且死亡率较高;5月16日,经市级专家组现场临床诊断和省级实验室复核,诊断为疑似小反刍兽疫疫情,经国家小反刍兽疫参考实验室检测,确诊为小反刍兽疫。5月18日,农业农村部公布了该起疫情。为追溯疫情可能来源,分析疫情扩散风险,科学指导疫情处置工作,开展了紧急流行病学调查。现场调查结果显示,该起疫情的袭击率为72.7%(136/187),病死率为55.9%(76/136)。溯源调查表明,疫情由羊贩运人及其运输车辆带毒传入和外购未经检疫羔羊带毒传入的风险较大,新生或外购羔羊未及时免疫小反刍兽疫疫苗是内在风险因素;追踪调查结果显示,疫情局限于该养羊户,向外扩散的风险较低。本起疫情提示,应做好养殖场区内的生物安全综合防控,重点加强相关人员及运输车辆、工具的移动控制,及时做好羔羊的疫苗免疫,降低疫情发生风险。

    Abstract:

    On May 15,2020,it was reported that,by Qingyuan Animal Disease Prevention and Control Center of Fushun City,some goats suffered from an acute disease in a household in Qingyuan County,with a high mortality rate. On May 16,it was diagnosed to be a suspected outbreak of peste des petits ruminants(PPR)through field clinical diagnosis by the municipal expert team and reexamination by provincial laboratory,and subsequently confirmed as PPR through detection by National Reference Laboratory for PPR. On May 18,the outbreak was announced by the Ministry of Agriculture and Rural Affairs. In order to trace all possible sources of the outbreak,analyze the risk of spreading and to scientifically guide relevant disposal,an epidemiological investigation was carried out. Results of field investigation showed that,the attack rate of the outbreak was 72.7%(136/187)and the fatality rate was 55.9%(76/136). It was indicated through traceability investigation that,the outbreak was likely caused by the virus carried by sheep dealers and the vehicles as well as purchased sheep without inspection and quarantine,especially,the internal risk factor was that some newborn or purchased lambs were not vaccinated with PPR vaccines in time. Through follow-up investigation,it was shown that the outbreak was limited to the household with a low risk of spreading. Therefore,comprehensive bio-security measures should be strengthened within farms,with the priority to control the movement of relevant personnel,transportation vehicles and tools,and to vaccinate lambs with relevant vaccines,so as to reduce the risk of any outbreak.

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兰德松,刘贺,王海丰,顾贵波,于本良.辽宁省一起小反刍兽疫疫情的紧急流行病学调查[J].《中国动物检疫》编辑部,2020,37(10):1-6.

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  • 在线发布日期: 2020-09-29
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