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Genomic Characterization and Pathogenicity of BJEU06-1-Like PRRSV-1 ZD-1 Isolated in China.
- Source :
- Transboundary & Emerging Diseases; 3/27/2023, p1-12, 12p
- Publication Year :
- 2023
-
Abstract
- Porcine reproductive and respiratory syndrome virus (PRRSV)-1 and PRRSV-2 have long been cocirculating in China. To date, all PRRSV-1 strains in China have been classified as subtype 1. We investigated the prevalence of PRRSV-1 in several areas of China from 2016 to 2022 and found that BJEU06-1-like strains comprised the main epidemic branch of PRRSV-1. Pathogenicity data for this subgroup are currently lacking. In this study, the Chinese BJEU06-1-like PRRSV-1 strain ZD-1 was isolated from primary alveolar macrophages (PAMs). ZD-1 has undergone no recombination and has a 5-aa discontinuous deletion in the Nsp2 protein, similar to other BJEU06-1-like strains; additionally, ZD-1 has a 26 aa C-terminal truncation in the GP3 gene. Pathogenicity studies revealed that ZD-1 causes obvious clinical symptoms: prolonged fever; reduced body weight; alveolar epithelial proliferation and moderate alveolar diaphragm widening in the lungs; diffuse lymphocytic hyperplasia in the lymph nodes; high levels of viremia in the serum; and elevated viral loads in the lungs, lymph nodes, and tonsils. These results suggested that the BJEU06-1-like PRRSV-1 strain ZD-1 is moderately pathogenic to piglets. This is the first study to evaluate the pathogenicity of the BJEU06-1-like branch in China, enriching the understanding of PRRSV-1 in China. [ABSTRACT FROM AUTHOR]
- Subjects :
- PORCINE reproductive & respiratory syndrome
LUNGS
ALVEOLAR macrophages
FEVER
TONSILS
Subjects
Details
- Language :
- English
- ISSN :
- 18651674
- Database :
- Complementary Index
- Journal :
- Transboundary & Emerging Diseases
- Publication Type :
- Academic Journal
- Accession number :
- 174409074
- Full Text :
- https://doi.org/10.1155/2023/6793604