一起水牛出血性败血症的暴发调查

Outbreak Investigation of Pasteurella multocida Infection in Buffalo in Sihui,Guangdong

2013年8月28日,广东省四会市某村报告了水牛死亡事件。为了弄清水牛发病的状况,查明发病原因,有效控制疫情,开展了本次现场调查。调查表明:本次疫情的袭击率为9.48%(11/116)、病死率为81.82%(9/11)、群流行率为11.54%(6/52)。初步诊断为多杀性巴氏杆菌引起的牛出血性败血症。通过病例-对照研究发现,出现病例前的舍饲点(P<0.01)、养牛户同时饲养犬(P<0.01)与水牛发病有关联。本次疫情具有舍饲点聚集性,购入牛只可能导致疫病传入,村内犬的活动可能对疫病传播起着媒介作用,气象因素对该病的发生起着诱导作用。建议引进牛只应先隔离观察,加强对牛多杀性巴氏杆菌的免疫接种,做好粪便的无害化处理。

Dead buffalo cases were reported in two villages of Sihui city,Guangdong province on Aug 28,2013. In order to make clear the epidemic situation,find out the source of infection and control the disease spread,field investigations were carried out. The investigation showed that the attack rate was 9.48%（11/116）,the morbidity was 81.82%（9/11）,and herd prevalence was 11.54%（6/52）. The disease was diagnosed as hemorrhagic septicemia caused by Pasteurella multocida. By case-control study,it was found that the disease was associated with housing location（P〈0.01） and dogs raised at the farm（P〈0.01）. The outbreak was characterized by housing cluster. Purchasing buffalo might introduce the disease to the villages;dog movement might spread the disease;and the meteorological factors induced the disease outbreak. Some suggestions were proposed such as quarantine,vaccination,biosafety disposal of feces.