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Co-infection status of porcine circoviruses (PCV2 and PCV3) and porcine epidemic diarrhea virus (PEDV) in pigs with watery diarrhea in Henan province, central China

文献类型： 外文期刊

作者： Guo, Zhenhua 1 ; Ruan, Haiyu 2 ; Qiao, Songlin 1 ; Deng, Ruiguang 1 ; Zhang, Gaiping 1 ;

作者机构： 1.Henan Acad Agr Sci, Key Lab Anim Immunol, Henan Prov Key Lab Anim Immunol, Minist Agr, Zhengzhou, Peoples R China

2.Henan Agr Univ, Coll Anim Sci & Vet Med, Zhengzhou 450002, Peoples R China

3.Jiangsu Coinnovat Ctr Prevent & Control Important, Yangzhou, Jiangsu, Peoples R China

关键词： PCV2; PCV3; PEDV; Co-infection; Phylogeny; Genetic diversity

期刊名称：MICROBIAL PATHOGENESIS （ 影响因子：3.738； 五年影响因子：3.663 ）

ISSN： 0882-4010

年卷期： 2020 年 142 卷

页码：

收录情况： SCI

摘要： Porcine circoviruses (PCV2 and PCV3) and porcine epidemic diarrhea virus (PEDV) are important swine viruses that threaten the swine industry worldwide. Here, we evaluated the co-infection status of PCV2, PCV3 and PEDV in 76 enteric samples from piglets with severe diarrhea disease in Henan, China. All samples were tested by PCR/RT-PCR. Our results showed that the infection rate of PCV2, PCV3 and PEDV was 82.89%, 76.32% and 68.42%, respectively. Interestingly, most of these samples exhibited mixed infections. The co-infection rates of PCV2 and PCV3, PCV2 and PEDV, PCV3 and PEDV were 69.74%, 57.89% and 53.95%, respectively. And the triple infection rate was 48.68%. Furthermore, the genetic characteristics of PCV2 and PCV3 were analyzed based on the cap genes. Two PCV2 genotypes, PCV2b and PCV2d, were circulating in the fields. The cap gene of PCV2b and PCV2d isolates only shared 94.6%-95.0% nucleotide identities. The PCV3 isolates together with the reference strains could be divided into four clades (cladel-4), and the cap genes of these isolates have 98.6%-100% nucleotide identities to each other. Distinctive amino acid substitutions were also characterized on the cap protein of PCV2 and PCV3 isolates. Our studies provide the new knowledge on the co-infectious status of PCV2, PCV3 and PEDV in China. The results also provide insight into the genetic diversity and molecular epidemiology of PCV2 and PCV3.

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