河南农业科学 ›› 2020, Vol. 49 ›› Issue (11): 134-140.DOI: 10.15933/j.cnki.1004-3268.2020.11.017

• • 上一篇    下一篇

利用猪口腔液检测规模化猪场猪群中PCV2的感染情况

郭振华1,阮海宇2,乔松林1,张改平1,2,3   

  1.  (1.河南省农业科学院 动物免疫学重点实验室,河南郑州 450002;2.河南农业大学 牧医工程学院,河南郑州 450002;3.江苏高校动物重要疫病与人兽共患病防控协同创新中心,江苏扬州 225009)
  • 收稿日期:2020-03-18 出版日期:2020-11-15 发布日期:2020-11-15
  • 通讯作者: 张改平(1960-),男,河南内黄人,中国工程院院士,研究员,博士,主要从事动物免疫学及疫病快速检测技术研究。E-mail:zhanggaip@126.com
  • 作者简介:郭振华(1984-),男,河南新乡人,助理研究员,博士,主要从事猪病毒病病原学及分子流行病学研究。E-mail:gzhuavet@163.com
  • 基金资助:
     河南省农业科学院科研发展专项(2019CY01);河南省生猪产业技术体系项目(S2012-06)

Study on PCV2 Prevalence in a Pig Farm through Detection of Swine Oral Fluid

GUO Zhenhua1,RUAN Haiyu2,QIAO Songlin1,ZHANG Gaiping1,2,3   

  1. (1.Henan Provincial Key Laboratory of Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.College of Animal Science and Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002,China;3.Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses,Yangzhou 225009,China)
  • Received:2020-03-18 Published:2020-11-15 Online:2020-11-15

摘要: 为探索利用猪口腔液开展猪圆环病毒2型(Porcine circovirus type 2,PCV2)的检测,选取豫北地区某规模化养殖场,评估口腔液在监测猪群PCV2感染状况时的应用效果。结果显示,从560头猪只共采集了28份口腔液样品,采样率约为20.0%,而70份血清样品的采样率仅为2.5%;通过PCR检测发现,28份口腔液的PCV2检出率为100.0% (28/28),而血清样品的检出率仅有2.86%(2/70)。为确定供试养殖场PCV2流行毒株的基因型,从不同阶段猪群样品中成功获得了6条PCV2的全基因组序列;核苷酸同源性分析显示,分离株与PCV2a、PCV2b、PCV2c、PCV2d和PCV2e的代表性毒株同源性分别约为97.0%、95.4%、93.3%、94.4%和91.6%;系统发育进化树分析显示,分离株和PCV2a处于同一进化分支。可见,供试养殖场流行毒株属于PCV2a基因型。

关键词: 猪, 口腔液, 圆环病毒2型, 疫病监测, 遗传进化, 基因型

Abstract: To explore the application of swine oral fluids in porcine circovirus type 2(PCV2) detection,PCV2 infectious status with oral fluids were evaluated in a large-scale pig farm in the north of Henan.The results showed that the sample rate of 28 oral fluid samples collected from 560 pigs was about 20.0%,while the 70 serum samples were only 2.5%.Importantly,the detection rate of PCV2 was 100.0%(28/28) in oral fluid samples and only 2.86%(2/70) in serum samples with PCR tests.To further identify the genotype of PCV2 in this farm,6 PCV2 genomes were successfully sequenced.The analysis of nucleotide identity showed that the PCV2 strains shared about 97.0%,95.4%,93.3%,94.4% and 91.6% identities with representative strains of PCV2a,PCV2b,PCV2c,PCV2d and PCV2e,respectively.The phylogenetic analysis showed that the isolates were clustered into the same branch with PCV2a.These results suggested that the genotype of PCV2 strains in this pig farm was PCV2a.

Key words: Swine, Oral fluid, PCV2, Disease monitor, Genetic and evolutionary, Genotype

中图分类号: