畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (10): 1671-1678.doi: 10.11843/j.issn.0366-6964.2014.10.013

• 预防兽医 • 上一篇    下一篇

2011—2013年河南省犬细小病毒分子流行病学调查与分析

丁轲1,2,余祖华2,彭春平1,赵战勤2,何雷2,贾艳艳2,张春杰1,2,程相朝1,2*,夏咸柱2,3   

  1. (1.河南科技大学宏翔生物饲料实验室,洛阳 471003;2.河南省动物疫病与公共安全院士工作站,洛阳 471003;3.解放军军事医学科学院军事兽医研究所,长春 130122)
  • 收稿日期:2014-02-17 出版日期:2014-10-23 发布日期:2014-10-23
  • 通讯作者: 程相朝(1966-),E-mail:chengxch@126.com
  • 作者简介:丁轲(1977- ),男,河南永城人,副教授,博士,硕士生导师,主要从事动物微生态与动物传染病研究,E-mail:keding19@163.com,Fax:0379-64895698
  • 基金资助:

    国家自然科学基金项目(31101744);河南省教育厅科学技术研究重点项目(13B230987);河南科技大学创新培育基金(2013ZCX017)

Molecular Epidemiological Investigation of Canine Parvovirus Isolates from Henan Province during 2011-2013

DING Ke1,2,YU Zu-hua2,PENG Chun-ping1,ZHAO Zhan-qin2,HE Lei2,JIA Yan-yan2,ZHANG Chun-jie1,2,CHENG Xiang-chao1,2*,XIA Xian-zhu2,3   

  1. (1.Hongxiang Biological Feed Laboratory,Henan University of Science and Technology,Luoyang 471003,China;2.Animal Disease and Public Security Academician Workstation of Henan Province,Luoyang 471003,China;3.Military Veterinary Institute,Academy of Military Medical Sciences,Changchun 130122,China)
  • Received:2014-02-17 Online:2014-10-23 Published:2014-10-23

摘要:

为了解近年来河南省犬细小病毒病的流行情况及毒株的分子变异特征,于2011—2013年从郑州、洛阳、开封、信阳等10个不同的地区采集了573份疑似犬细小病毒病病例样品,首先采用国标法检测犬细小病毒(CPV)VP2基因462—1 023 bp片段,对扩增的序列进行测序和进化树分析。在分类的基础上分别挑选出代表性毒株,克隆VP2全基因,测序后进行比较分析。结果表明,国标法检测样品的阳性率为88.48%,阳性毒株分为7个分支,通过对7个代表毒株VP2基因426AA的碱基组成分析,发现6株属于CPV-2a型,1株属于CPV-2b型。与国内外的代表毒株的核苷酸相似性为98.4%~99.9%,氨基酸相似性为97.6%~100.0%。遗传进化树分析表明,7个CPV分离株分属于2个分支,其中KJ438801株与其它分离株亲缘关系较远。氨基酸序列比较发现共有12个位点发生变异,其中突变率较高的位点是267、297、324、440、555位氨基酸,每个毒株均有2~3个氨基酸发生突变。以上结果表明,河南省流行的CPV以CPV-2a型和CPV-2b型并存,但以CPV-2a型为主,且基因呈多变异现象,从而为河南省犬细小病毒病的疫苗研发和防治提供了科学的参考依据。

Abstract:

In order to investigate the prevalence and the molecular evolutionary characteristics of canine parvovirus (CPV) infection in Henan province during 2011-2013,573 suspected CPV samples were collected from 10 different areas,such as Zhengzhou,Luoyang,Kaifeng,Xinyang,etc.Partial of the VP2 fragments (462-1 023 bp) of CPV were amplified by national standard method (NSM).Based on the sequenced results and phylogenetic tree analysis,the representative strains were selected and complete VP2 genes were cloned,sequenced and analyzed.The results showed that the positive rate was 88.48% by NSM,and the positive strains were divided into 7 branches.According to the VP2 gene characteristics,6 branches were CPV-2a type,and 1 branch of CPV was CPV-2b type.Sequence analysis for VP2 gene between CPV isolates and 30 CPV representative strains accessed in GenBank showed that the homology of nucleotides and amino acids were 98.4%-99.9% and 97.6%-100.0%,respectively.Phylogenetic analysis indicated that the 7 CPV isolations were divided into two groups,only one strain (No.KJ438801) was far from the other 6 isolates.The comparison of amino acid sequence showed that 12 mutated sites were found,of which,the 267,297,324,440,555 amino acid sites were easiest to mutate,and there were at least 2-3 sites of amino acid mutated in each strain.These results indicated that the CPV-2a and CPV-2b were coexisted and the CPV-2a was the primary pathogen in Henan province.More importantly,the VP2 gene showed multiple variations in different strains.The results of this study provide a scientific basis for improving the vaccine design and the control of CPV.

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