湖北农业科学 ›› 2024, Vol. 63 ›› Issue (9): 156-160.doi: 10.14088/j.cnki.issn0439-8114.2024.09.026

• 动物科学 • 上一篇    下一篇

一株鸭疫里氏杆菌的分离、鉴定与生物学特性分析

王博焘1,2, 郭云清2, 张腾飞2, 张文婷2, 卢琴2, 胡巧2, 罗青平2,3, 翟新国1   

  1. 1.河北工程大学生命科学与食品工程学院,河北 邯郸 056000;
    2.农业农村部畜禽细菌病防治制剂创制重点实验室/畜禽病原微生物学湖北省重点实验室/畜牧兽医研究所,湖北省农业科学院,武汉 430064;
    3.湖北洪山实验室,武汉 430064
  • 收稿日期:2023-09-05 出版日期:2024-09-25 发布日期:2024-09-30
  • 通讯作者: 翟新国(1966-),男,副教授,主要从事重要动物传染病防控研究,(电子信箱)zhaixg1966@163.com。
  • 作者简介:王博焘(1999-),男,河北邯郸人,在读硕士研究生,研究方向为家禽细菌病流行病学调查,(电话)17349805675(电子信箱)954724079@qq.com;罗青平(1971-),女,研究员,主要从事禽病防控研究,(电子信箱)qingping0523@163.com。
  • 基金资助:
    重要家禽疫苗效力评价用菌毒种筛选与研究(2022YFD1800602); 湖北省农业科技创新2020年重大科技研发专项(2020-620-000-002-04; 2020-620-000-002-01); 国家肉鸡产业技术体系(CARS-41); 湖北省科技重大专项-主要动植物品种选育及生物制品研发项目(2020ABA016)

Isolation, identification and biological characterization of a strain of Riemerella anatipestifer

WANG Bo-tao1,2, GUO Yun-qing2, ZHANG Teng-fei2, ZHANG Wen-ting2, LU Qin2, HU Qiao2, LUO Qing-ping2,3, ZHAI Xin-guo1   

  1. 1. College of Life Science and Food Engineering, Hebei University of Engineering, Handan 056000, Hebei, China;
    2. Key Laboratory of Creation of Preparations for the Prevention and Control of Bacterial Diseases of Livestock and Poultry, Ministry of Agriculture and Rural Affairs/Hubei Provincial Key Laboratory of Livestock and Poultry Pathogenic Microbiology/Institute of Animal Husbandry and Veterinary, Hubei Academy of Agricultural Sciences,Wuhan 430064, China;
    3. Hubei Hongshan Laboratory, Wuhan 430064, China
  • Received:2023-09-05 Published:2024-09-25 Online:2024-09-30

摘要: 为确定引起2022年湖北省襄阳市某规模化鸭场的鸭急性死亡病因,对病料进行病原菌分离、对分离株进行生化特性鉴定、耐药性测定、动物回归试验及全基因组测序。结果表明,急性死亡的鸭病原菌仅有鸭疫里氏杆菌(Riemerella anatipestifer)分离鉴定为阳性。药敏结果显示分离菌株对药物敏感性较高,仅对环丙沙星、氧氟沙星耐药;动物回归试验结果显示分离菌株可引起雏鸭急性死亡,剖检可见典型的浆膜炎症状。组织病理学切片显示心脏、肝脏被膜有明显纤维性渗出,心肌细胞有炎性浸润、脾脏实质内可见淋巴细胞数量明显减少、脑组织可见较多的血管淤血扩张。毒力测定显示分离菌株的半数致死量为3.06×106 CFU/mL。

关键词: 鸭疫里氏杆菌(Riemerella anatipestifer), 生化特性, 回归试验, 病理变化, 毒力

Abstract: In order to determine the cause of acute death of ducks in a large-scale duck farm in Xiangyang City, Hubei Province in 2022, the pathogenic bacteria were isolated, and the biochemical characteristics, drug resistance, animal regression tests and whole genome sequencing of the isolated strain were identified. The results showed that only Riemerella anatipestifer was isolated and identified as positive in acute dead duck pathogens. The drug susceptibility results showed that the isolated strains had high sensitivity to antibiotics and were resistant to ciprofloxacin and ofloxacin. The results of animal regression experiments showed that isolated strains could cause acute death of ducklings, typical symptoms of serositis were seen on autopsy. Histopathological sections showed obvious fibrous exudation of the heart and liver envelope, inflammatory infiltration of cardiomyocytes, a significant decrease in the number of lymphocytes in the spleen parenchyma, and more vascular congestion and expansion in brain tissue. Virulence assays showed that the half lethal dose of isolated strains was 3.06×106 CFU/mL.

Key words: Riemerella anatipestifer, biochemical properties, regression testing, pathological changes, virulence

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