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Wu Y, Zhang G, Jiang H, Xin T, Jia L, Zhang Y, Yang Y, Qin T, Xu C, Cao J, Ameni G, Ahmad A, Ding J, Li L, Ma Y, Fan X. Molecular Characteristics of Bovine Viral Diarrhea Virus Strains Isolated from Persistently Infected Cattle. Vet Sci 2023; 10:413. [PMID: 37505819 PMCID: PMC10384089 DOI: 10.3390/vetsci10070413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/08/2023] [Accepted: 06/15/2023] [Indexed: 07/29/2023] Open
Abstract
In this study, we reported the isolation, identification, and molecular characteristics of nine BVDV strains that were isolated from the serum of persistently infected cattle. The new strains were designated as BVDV TJ2101, TJ2102, TJ2103, TJ2104, TJ2105, TJ2106, TJ2107, TJ2108 and TJ2109. The TJ2102 and TJ2104 strains were found to be cytopathic BVDV, and the other strains were non-cytopathic BVDV. An alignment and phylogenetic analysis showed that the new isolates share 92.2-96.3% homology with the CP7 strain and, thus, were classified as the BVDV-1b subgenotype. A recombination analysis of the genome sequences showed that the new strains could be recombined by the major parent BVDV-1a NADL strain and the minor parent BVDV-1m SD-15 strain. Some genome variations or unique amino acid mutations were found in 5'-UTR, E0 and E2 of these new isolates. In addition, a potential linear B cell epitopes prediction showed that the potential linear B cell epitope at positions 56-61 is highly variable in BVDV-1b. In conclusion, the present study has identified nine strains of BVDV from persistently infected cattle in China. Further studies on the virulence and pathogenesis of these new strains are recommended.
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Affiliation(s)
- Yinghao Wu
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China
| | - Guangzhi Zhang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hui Jiang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Ting Xin
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Li Jia
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China
| | - Yichen Zhang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yifei Yang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Tong Qin
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Chuang Xu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jie Cao
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Gobena Ameni
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Abu Dhabi P.O. Box 15551, United Arab Emirates
| | - Arfan Ahmad
- University Diagnostic Lab, University of Veterinary & Animal Sciences, Lahore 54000, Pakistan
| | - Jiabo Ding
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Limin Li
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China
| | - Yuzhong Ma
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China
| | - Xuezheng Fan
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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Ryu JH, Choi KS. Genetic analysis of bovine viral diarrhea virus in pre-weaned native Korean calves. Trop Anim Health Prod 2019; 51:2085-90. [PMID: 30955148 DOI: 10.1007/s11250-019-01882-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/22/2019] [Indexed: 10/27/2022]
Abstract
Bovine viral diarrhea virus (BVDV), a prominent viral pathogen worldwide, causes substantial economic losses in the cattle industry. BVDV comprises two recognized species, BVDV-1 and BVDV-2, and at least 21 subtypes (1a-1u) for BVDV-1 and four subtypes (2a-2d) for BVDV-2 based on its 5'-untranslated region. This study aimed at investigating the prevalence and genetic analysis of BVDV in calf feces in the Republic of Korea (ROK). We collected fecal samples from 635 pre-weaned native Korean calves aged 1-60 days, regardless of diarrhea, and subjected them to RT-PCR and phylogenetic analysis. Thirty-five (5.5%) of the 635 samples were positive for BVDV infection. BVDV was detected in 20, 10, and 5 calves aged 1-20 days, 21-40 days, and 41-60 days, respectively. BVDV was the most frequent in 17 normal feces, followed by 16 diarrheic feces, and 2 hemorrhagic feces. Phylogenetic analysis revealed that 25 samples belonged to BVDV-1b; 1 sample, BVDV-1c; and 9 samples, BVDV-2a. Moreover, the BVDV-1b and BVDV-2a isolates showed genetic variations. BVDV-1b was detected in diarrheic, hemorrhagic, and normal fecal samples. Thus, BVDV-1b is the most prevalent in calves and causes enteric disease with differing severity. BVDV-1c was newly identified in diarrheic calves. Further studies are warranted to elucidate the pathogenesis of BVDV-1c infection and its clinical manifestations. Our results indicate that effective vaccines and control programs against BVDV are required in the ROK.
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