鸭瘟病毒新近分离毒株部分基因变异分析

doi:10.11843/j.issn.0366-6964.2018.10.017

畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (10): 2215-2222.doi: 10.11843/j.issn.0366-6964.2018.10.017

鸭瘟病毒新近分离毒株部分基因变异分析

傅光华¹, 陈翠腾¹, 刘荣昌¹, 卢立志², 施少华¹, 江斌¹, 傅秋玲¹, 程龙飞¹, 沈军达², 田勇², 万春和¹, 陈红梅¹, 黄瑜^1*

1. 福建省农业科学院畜牧兽医研究所, 福建省禽病防治重点实验室, 福州 350013;
2. 浙江省农业科学院畜牧兽医研究所, 杭州 310021

收稿日期:2018-02-23 出版日期:2018-10-23 发布日期:2018-10-23
通讯作者: 黄瑜,E-mail:huangyu_815@163.com
作者简介:傅光华(1977-),男,江西永丰人,研究员,博士,主要从事分子流行病学研究,Tel:0591-87572396,E-mail:fuyuan163@163.com
基金资助:
国家水禽产业技术体系（CARS-42）；福建省属公益类科研院所基本科研专项（2017R1023-7）；福建省农科院重点院创新团队（STIT2017-1-5）；福建省自然科学基金（2015J01113）；福建省农科院青年英才计划项目（YC2015-13）

Genetic Variability of Partial Genes of Duck Plaque Viruses Currently Isolated in Ducks

FU Guang-hua¹, CHEN Cui-teng¹, LIU Rong-chang¹, LU Li-zhi², SHI Shao-hua¹, JIANG Bin¹, FU Qiu-ling¹, CHENG Long-fei¹, SHEN Jun-da², TIAN Yong², WAN Chun-he¹, CHEN Hong-mei¹, HUANG Yu^1*

1. Institute of Animal Husbandry and Veterinary Medicine of Fujian Academy of Agricultural Sciences, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China;
2. Institute of Animal Husbandry and Veterinary Medicine of Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2018-02-23 Online:2018-10-23 Published:2018-10-23

摘要/Abstract

摘要：

旨在研究鸭群中新流行的鸭瘟病毒（duck plaque virus，DPV）感染状况及其分子特征。本研究对2016-2017年福建不同地区疑似感染DPV的发病鸭组织样品进行了检测、病毒分离和部分基因的序列分析。从临床样品中分离获得24株DPV，发现确诊感染DPV鸭的日龄存在品种差异性，其中半番鸭和番鸭感染DPV的日龄中位值分别为90和88 d，而麻鸭感染DPV的日龄中位值为287 d。对DPV UL56/LORF5基因、TK/gH基因及UL2区域的序列分析表明，分离毒株均未出现基因片段缺失，与我国DPV参考强毒株的序列相似性均在99%以上，但在UL56/LORF5基因及TK基因上存在有规律性的核苷酸变异。经分子系统进化分析发现，新近流行的DPV毒株与我国参考强毒株（Group Ⅰ）处于不同进化分支，为GroupⅡ进化分支，且可进一步细分为两个不同的亚分支（GroupⅡa、GroupⅡb）。以上结果揭示，新近流行的DPV毒株感染不同品种鸭存在日龄差异性，与我国DPV参考强毒株相比已出现不同程度的变异，应加强对该病毒的分子流行病学监测，实时了解其流行变异情况，为新流行鸭瘟的快速准确诊断和防控提供科学依据。

Abstract:

The purpose of this study was to explore the infection status and molecular characteristics of duck plaque virus (DPV) currently circulating in ducks. The duck samples suspected to be infected with DPV were collected from Fujian province during 2016-2017, and were used for virus detection, isolation and gene sequences analysis. A total of 24 DPV strains were isolated from these samples, and the median age (Me) of the confirmed DPV-positive ducks were different among duck species. The Me of DPV-positive Mule duck and Muscovy duck were 90-day old and 88-day old, respectively, while the Me of DPV-positive Sheldrake duck was 287-day old. Sequence analysis showed that UL56/LORF5 gene, TK/gH gene and UL2 gene of the 24 isolates shared as high as more than 99% nucleotide homology with those of Chinese DPV reference virulent strains,and there exist regular nucleotide variations among the UL56/LORF5 gene and the TK gene between the current isolates and the Chinese reference virulent strains. Phylogenetic analysis showed that all of the current DPV isolates were gathered into one phylogenetic branch (Group Ⅱ) which different from the Chinese reference virulent strains (Group Ⅰ), and could further be divided into two sub-branches (Group Ⅱa and Group Ⅱb). The above results indicated that DPVs still circulated in ducks with Me-disparity among duck species, carrying some regular mutations compared to the Chinese reference virulent strains. We should strengthen the regular molecular epidemiological surveillance, and be aware of the epidemic variation of the virus. This will help for the rapid and accurate diagnosis and disease control of duck plague in China.

中图分类号:

S852.659.1

傅光华, 陈翠腾, 刘荣昌, 卢立志, 施少华, 江斌, 傅秋玲, 程龙飞, 沈军达, 田勇, 万春和, 陈红梅, 黄瑜. 鸭瘟病毒新近分离毒株部分基因变异分析[J]. 畜牧兽医学报, 2018, 49(10): 2215-2222.

FU Guang-hua, CHEN Cui-teng, LIU Rong-chang, LU Li-zhi, SHI Shao-hua, JIANG Bin, FU Qiu-ling, CHENG Long-fei, SHEN Jun-da, TIAN Yong, WAN Chun-he, CHEN Hong-mei, HUANG Yu. Genetic Variability of Partial Genes of Duck Plaque Viruses Currently Isolated in Ducks[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2018, 49(10): 2215-2222.

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鸭瘟病毒新近分离毒株部分基因变异分析

Genetic Variability of Partial Genes of Duck Plaque Viruses Currently Isolated in Ducks

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