畜牧兽医学报 ›› 2024, Vol. 55 ›› Issue (9): 4051-4060.doi: 10.11843/j.issn.0366-6964.2024.09.029

• 预防兽医 • 上一篇    下一篇

一株鸽副黏病毒Ⅰ型分离鉴定及致病性分析

张姗1,2(), 刘大虎1,2,3, 刘宝京4, 梁琳1,2, 梁瑞英1,2, 汤新明1,2, 仇旭升5, 丁铲5, 丁家波1,2,*(), 侯绍华1,*()   

  1. 1. 中国农业科学院北京畜牧兽医研究所, 北京 100193
    2. 农业农村部动物生物安全风险预警及防控重点实验室(北方)/农业农村部兽用生物制品与化学药品重点实验室, 北京 100193
    3. 天津农学院动物科学与动物医学学院, 天津市农业动物繁育与健康养殖重点实验室, 天津 300392
    4. 北京信和翔科技有限责任公司, 北京 100085
    5. 中国农业科学院上海兽医研究所, 上海 200241
  • 收稿日期:2023-11-16 出版日期:2024-09-23 发布日期:2024-09-27
  • 通讯作者: 丁家波,侯绍华 E-mail:zhangshan0276@163.com;dingjiabo@caas.cn;houshaohua@caas.cn
  • 作者简介:张姗(1992-), 女, 河北涞水人, 博士, 主要从事兽医公共卫生研究, E-mail: zhangshan0276@163.com
  • 基金资助:
    上海市肉鸽产业技术体系建设(沪农科产字(2023)第12号);中国农业科学院创新工程计划(ASTIP-IAS15)

Isolation, Identification and Pathogenicity Analysis of a Pigeon Paramyxovirus-1 Strain

Shan ZHANG1,2(), Dahu LIU1,2,3, Baojing LIU4, Lin LIANG1,2, Ruiying LIANG1,2, Xinming TANG1,2, Xusheng QIU5, Chan DING5, Jiabo DING1,2,*(), Shaohua HOU1,*()   

  1. 1. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
    2. Key Laboratory of Animal Biosafety Risk Prevention and Control (North)/Key Laboratory of Veterinary Biological Products and Chemicals, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
    3. Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry, College of Animal Science and Veterinary Medicine, Tianjin Agricultural University, Tianjin 300392, China
    4. Bejing Xinhexiang Technology Co., LLC, Beijing 100085, China
    5. Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China
  • Received:2023-11-16 Online:2024-09-23 Published:2024-09-27
  • Contact: Jiabo DING, Shaohua HOU E-mail:zhangshan0276@163.com;dingjiabo@caas.cn;houshaohua@caas.cn

摘要:

在天津的病死鸽病料中分离鉴定鸽副黏病毒Ⅰ型(pigeon paramyxovirus-1, PPMV-1), 并对其进行遗传演化、生物学特性、致病性分析, 为鸽副黏病毒Ⅰ型疫苗的研发提供科学依据。采用RT-PCR方法进行病原检测, 在SPF鸡胚上分离纯化病毒; 经遗传演化分析、致病性分析及动物回归试验对病毒分离株进行全面分析。结果显示: 病死鸽的脏器样品经RT-PCR鉴定为NDV核酸阳性; 鸡胚分离纯化后得到1株鸽副黏病毒Ⅰ型毒株, 命名为Pigeon/TJ/CH/020/2020 (TJ20)。通过对病毒F基因测序及进化树分析, 确定该分离毒株属于ClassⅡ类Ⅵ.2.1.1.2.2(原Ⅵk)基因亚型, 裂解位点的氨基酸残基为112R-R-Q-K-R-F117, 符合NDV强毒株的分子特征。交叉血凝抑制试验显示TJ20株与LaSota疫苗株存在明显的抗原性差异。TJ20株的鸡胚半数感染量(EID50)为10-8.38·0.1 mL-1、细胞半数感染量(TCID50)为10-8.64·0.1 mL-1、鸡胚平均致死时间(MDT)为62 h、1日龄雏鸡脑内接种致病指数(ICPI)为1.19。动物感染试验结果表明, 1月龄鸽人工感染TJ20株后第4天开始出现嗜睡、垂翅、腹泻、瘫痪、斜颈扭头等新城疫典型临床症状, 发病率和死亡率均为100%。本研究从病死鸽组织中成功分离出一株具有高致病性的Ⅵ.2.1.1.2.2(原Ⅵk)基因亚型的TJ20毒株, 为后续鸽副黏病毒Ⅰ型疫苗研发提供了重要的生物学材料。

关键词: 鸽副黏病毒Ⅰ型, 分离鉴定, Ⅵ.2.1.1.2.2(原Ⅵk)基因亚型, 致病性

Abstract:

A strain of pigeon paramyxovirus-1(PPMV-1) was isolated from the dead pigeon tissue in Tianjin region. To provide scientific basis for the development of PPMV-1 vaccines, the genetic evolution, biological characteristics, and pathogenicity of the virus were analyzed. The pathogens were identified by RT-PCR, virus isolation, purification by chicken embryos, genetic evolution analysis, pathogenicity analysis, and animal regression tests. A strain of PPMV-1 was isolated from the dead pigeons and named Pigeon/TJ/CH/020/2020 (TJ20). Sequence analysis and homology analysis of the virus F gene showed that the strain belonged to sub-genotype Ⅵ.2.1.1.2.2(Ⅵk), and the amino acid residues of the cleavage site were 112R-R-Q-K-R-F117, which were consistent with the molecular characteristics of NDV virulent strains. Hemagglutination inhibition revealed a noticeable difference between TJ20 and LaSota. The values of TCID50, EID50, MDT and ICPI were 10-8.64·0.1 mL-1, 10-8.38·0.1 mL-1, 62 h, 1.19. The animal infection experiment found that pigeons showed clinical symptoms on 4 dpc (day 4 post-challenge). The incidence rate and mortality were 100%, and the cloacal detoxification rate could reach 100% on 5 dpc. TJ20 was highly pathogenic to pigeons. This study successfully isolated a highly pathogenic sub-genotype Ⅵ.2.1.1.2.2(Ⅵk) TJ20 strain from samples of dead pigeons, providing important biological materials for the research and development of vaccine of PPMV-1 in the future.

Key words: pigeon paramyxovirus-1, isolation and identification, sub-genotype Ⅵ.2.1.1.2.2(Ⅵk), pathogenicity

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