Since Nov. 4th 2017,a series of symptoms of cough,asthma and fever occurred in fattening pigs in a swine farm of Shandong Province,and the diseased pigs died in 6 to 7 days after onset. Subsequently,abortions occurred in individual sows,and respiratory symptoms and deaths appeared in suckling and nursery piglets in succession. In order to explore the possible causes and to adopt effective prevention and control measures in time,an emergency epidemiological survey was carried out. At last,the outbreak was confirmed as mixed infection of Porcine reproductive and respiratory syndrome virus(PRRSV)and Pseudorabies virus(PRV)by field investigation, clinical diagnosis and laboratory test. It was found that the possible causes might be disease outbreak in neighboring farms,staff transmission,cold and weaning stress. Based on the epidemic situation,suggestions were put forward as follows:carrying out an emergent immunization of PRV vaccines towards the whole group,treating the diseased pigs with long-acting Oxytetracycline and antibiotics. The farmers took measures as suggested,and the outbreak was finally controlled.%2017年11月4日起,山东省某猪场部分育肥猪出现咳嗽、气喘、发烧等症状,发病6~7 d后死亡.随后,个别母猪发生流产,哺乳仔猪、保育猪接连出现呼吸道症状并死亡.为探寻可能的发病原因,以便及时提出并采取行之有效的防控措施,开展了紧急流行病学调查.通过现场调查、临床诊断与实验室检测,确定本次疫情系猪蓝耳病病毒与伪狂犬病病毒混合感染所致.调查发现:邻场发病、人员传播、寒冷应激、断奶应激均可能是诱发此次疫情的原因.针对此次疫情,提出全群紧急免疫伪狂犬病疫苗,并配合使用长效土霉素与抗生素进行治疗等建议.养殖户采纳了建议并采取了相应措施,最终疫情得到有效控制.
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