›› 2018, Vol. 45 ›› Issue (7): 1933-1941.doi: 10.16431/j.cnki.1671-7236.2018.07.026

Previous Articles     Next Articles

Isolation and Identification of Canine Parvovirus CPV-BJ03/17 Strain and Genetic Evolution Analysis of VP2 Gene

WANG Yang1, HU Bo1, LU Rongguang1, LV Shuang1, ZHAO Hui2, LIAN Shizhen1, YAN Xijun1   

  1. 1. Key Laboratory of Special Animal Epidemic Disease, Ministry of Agriculture, P. R. Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun 130112, China;
    2. Dunhua Animal Husbandry Administration Bureau, Dunhua 133700, China
  • Received:2017-12-04 Online:2018-07-20 Published:2018-07-20

Abstract:

In order to study the genetic variation of current domestic canine parvovirus (CPV),the intestinal tissue were collected from a suspected CPV infected canine in Beijing.After sample tissues were processed by asepsis work,virus was inoculated in F81 cells and identified by electron microscopy,serology,molecular biology and challenge test.The results indicated that the virus produced typical CPE on F81 cells and the HA blood coagulation rate was 1:256.The diameter of virus particle was about 20 nm observed by electron microscopy.The specific band was at 570 bp in PCR identification which proved that the virus isolated from the samples was CPV,and named CPV-BJ03/17.The results of whole-genome sequencing and analysis indicated that the full length virus genome was 4 620 bp,GenBank accession No.:MF134808,and this virus strain had a closer relationship with virus isolated from Guangdong (SC02/2011),Shenzhen (CPV-s5) and Gansu (CPV-LZ1) whose nucleotide identities were all 99.7%.The analysis of VP2 amino acid sequence suggested that CPV-BJ03/17 belonged to a New CPV-2a subtype.The major amino acid sites of CPV-BJ03/17 showed no significant changes compared with the recent isolated stain BJ15-1.Animal experiments showed that CPV-BJ03/17 was a high CPV virulent strain.In conclusion,a high CPV virulent strain was isolated in this study,according to the comparison of CPV prevalence and genetic variation,this results also provided a reference for CPV disease treatment and vaccine research.

Key words: canine parvovirus (CPV); isolation and identification; sequence analysis

CLC Number: