Isolation and characterization of a variant subgroup GII-a porcine epidemic diarrhea virus strain in China

0Citations
Citations of this article
17Readers
Mendeley users who have this article in their library.

Abstract

Background: Highly virulent variants of porcine epidemic diarrhea virus (PEDV) have been closely associated with recent outbreaks of porcine epidemic diarrhea (PED) in China, which have resulted in severe economic losses to the pork industry. Methods: In the current study, the variant PEDV strain HM2017 was isolated and purified and a viral growth curve was constructed according to the median tissue culture infective dose (TCID50). HM2017 were amplify with RT-PCR and analyzed by phylogeny analysis. Animal pathogenicity experiment was carried to evaluate the HM2017 clinical assessment. Results: Genome-based phylogenetic analysis revealed that PEDV strain HM2017 was clustered into the variant subgroup GII-a that is currently circulating in pig populations in China. The highest median tissue culture infectious dose of strain HM2017 after 15 passages in Vero cells was 1.33 × 107 viral particles/mL. Strain HM2017 was highly virulent to suckling piglets, which exhibited clinical symptoms at 12 h post-infection (hpi) (i.e., weight loss at 12–84 hpi, increased body temperatures at 24–48 hpi, high viral loads in the jejunum and ileum, and 100% mortality by 84 hpi). Conclusion: The present study reports a variant subgroup GII-a PEDV HM2017 strain in China and characterize its pathogenicity. PEDV strain HM2017 of subgroup GII-a presents a promising vaccine candidate for the control of PED outbreaks in China.

Cite

CITATION STYLE

APA

Yang, D., Su, M., Li, C., Zhang, B., Qi, S., Sun, D., & Yin, B. (2020). Isolation and characterization of a variant subgroup GII-a porcine epidemic diarrhea virus strain in China. Microbial Pathogenesis, 140. https://doi.org/10.1016/j.micpath.2019.103922

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free