ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (6): 1265-1273.doi: 10.11843/j.issn.0366-6964.2018.06.019

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Epidemiological Investigation and Genetic Diversity Analysis of Porcine Circovirus Type 3 in Slaughter Pigs of a City in Guangxi

JI Cheng-yuan, WANG Wei-yi, FENG Xuan-rong, YAO Jing, HUANG Xin, FENG Yuan-qing, QIN Yi-feng, FANG Qing-li, CHEN Ying, OUYANG Kang, WEI Zu-zhang, HUANG Wei-jian*   

  1. College of Animal Science and Technology, Guangxi University, Nanning 530004, China
  • Received:2017-12-06 Online:2018-06-23 Published:2018-06-22

Abstract:

In order to understand the epidemic status and phylogenetic relationship of porcine circovirus type 3 in healthy slaughter pigs, 181 lymph nodes collected from slaughterhouse in Guangxi were detected for PCV3 pathogens. PCV3 infection in healthy slaughter pigs was detected by PCR method. The positive rate of PCV3 was 24.31%, which suggest that the infection of PCV3 in healthy pigs is more severe. Six PCV3 complete genome sequences were amplified with PCR in the positive samples.Compared with PCV3 complete genome in GenBank and the results showed the nucleotide homology of PCV3 sequences was 98.6%-99.9% and genes of PCV3 were very conservative and similar. Genetic evolution analysis of PCV3 ORF2 gene showed that PCV3 strains could be divided into two major types. Analyses of the phylogenetic relationship of PCVs Cap and suggesting cross protection between PCV2 and PCV3 is impossible.

Key words: porcine circovirus type 3, complete genenome, sequence analysis, phylogenetic analysis

CLC Number: