我国北部一淡水湖野生黑颈䴙䴘死亡的原因调查
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S851.3

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联合国粮农组织-中国兽医现场流行病学培训项目


A cause Investigation on the Death of Wild Black-necked Grebes in a reshwater lake of Northern China
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    摘要:

    2015年5月14—15日,内蒙古自治区某淡水湖出现大量黑颈??死亡。5月21日,内蒙古自治区动物疫病预防控制中心组织相关专家赶赴现场,开展了紧急流行病学调查,分析黑颈??的死亡原因,评估该事件对当地家禽养殖的风险。调查结果显示:此次事件中的黑颈??死亡率约为46.2%,未发现有其他鸟类和家禽死亡;该淡水湖周围5 km范围内的其它地点未有禽类死亡,对该范围内的活野鸟和家禽进行抽样检测,未检出禽流感病原,但国家禽流感参考实验室从送检的死亡野鸟病料样品中均检出H5N1亚型高致病性禽流感病毒,并且检测发现该区域内家禽的H5亚型禽流感免疫抗体合格率较低;在野鸟向家禽传播疫病的7个风险因素中,家禽养殖方式、家禽免疫状况的风险程度较高。调查认为,本次黑颈??死亡事件是由其自身所携带的禽流感病毒暴发所引起的,该区域内家禽发生疫情的风险不高。

    Abstract:

    On May 14 and 15,2015,large numbers of wild black-necked grebes were found dead in a freshwater lake in Inner Mongolia. Preliminary diagnosis showed that the reason of mass mortality was suspected to be avian influenza(AI)infection. Subsequently,relevant experts organized by Inner Mongolia animal disease prevention and control center rushed to the scene to conduct an epidemiological investigation of emergency,so as to analyze and find out the death reason and evaluate the new risk for local poultry farming because of the death of wild birds. The investigation results showed that the wild black-necked grebes died in this incident with a death rate of 46.2%,and there was no death of other poultry and birds. In addition, case of infection was not found in this lake's surrounding areas of a range of 5 km. Sampling detection for wild birds and poultry in this region was conducted,no pathogen of AIV was detected. However,the qualification rate of post-vaccination antibody against H5 subtype AIV was relative low,and H5N1 subtype highly pathogenic avian influenza(HPAI)viruses were found in all the collected epidemic materials of the dead wild birds by the national avian influenza reference laboratory of China(NAIRL).Among 7 risk factors of poultry infection by disease transmission from the wild birds,the poultry feeding methods and its vaccination situation were two major factors,possessing a high risk level. According to the investigation,the death was caused by AIV carried by wild black-necked grebes themselves and the epidemic risk of the poultry in this region was low.

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贾皓,宝音达来,武拉俊,马立峰,戴晓光,申捷,萨茹拉,郝璐,云涛,郭文,苏胜杰,郭金贵,菊花,刘志伟,崔基贤,孙鹏飞,王大伟,赵心力.我国北部一淡水湖野生黑颈䴙䴘死亡的原因调查[J].《中国动物检疫》编辑部,2017,34(3):30-33.

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  • 在线发布日期: 2017-03-07
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