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Liu H, Li T, Tang J, Ding S, Wang D. Complete genome sequence analysis of Reticuloendotheliosis virus integrated in nonhomologous Avipoxvirus. Microb Pathog 2024; 194:106827. [PMID: 39084308 DOI: 10.1016/j.micpath.2024.106827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 07/26/2024] [Accepted: 07/26/2024] [Indexed: 08/02/2024]
Abstract
Integration of nucleic acid sequences of Reticuloendotheliosis virus (REV) in Avipoxvirus(APV) has become commonplace. In this study, 4 strains of suspected Fowlpox virus (FPV) and 1 strain of suspected Pigeonpox virus (PPV) collected in Taiyuan, Shanxi Province were cultured in chicken embryos, and the 4b core protein gene was amplified by PCR, and the identity and genome similarity were determined by sequence analysis. The sequences between the end of ORF201 and the beginning of ORF203 of FPV and PPV were then amplified, sequenced, and subjected to sequence comparison to determine genome similarity. The results showed that the isolates were 4 strains of FPV and 1 strain of PPV. The 4 isolated strains of FPV belong to type A1 virus, with 100 % identity to each other and to the FWPV-09-Jilin strain isolated in Jilin, China, and the lowest identity to the type B2 virus TNPV5/NZL/2009, which is only 74 %. PPV belongs to type A2 virus, and its identity with local strain of fowlpox virus was 90.1 %, with the highest identity of 100 % with PPLH and ROPI/W370/ON/2012 and ow_2017_3 strains, which also belong to type A2 pigeonpox virus, and the lowest identity of 73.7 % with TNPV5/NZL/2009, a type B2 virus. The complete genome of REV sequences integrated into FPV and PPV were amplified, and 5 REV nucleic acid sequences were obtained after sequencing and concatenation, with lengths ranging from 7942 to 8005 bp. The identity analysis results indicate that it has high identity with isolates from Northeast China, Guangdong, and Guangxi regions in China. Based on its gp90 protein gene, the REV integrated into the poxvirus belong to type III, with the highest identity of 99.9% with strains such as APC-566 and CY1111, and the lowest identity with REV-Anhui1, at 95.4 %. The length of the pol gene varies among different strains of REV, and its encoded amino acid changes significantly after position 675, with deletions and alterations. This study indicates that all fowlpox viruses isolated in Taiyuan, Shanxi Province have integrated the entire REV gene sequence, with high identity between them. At the same time, it indicates that the pigeonpox virus isolate has also integrated the entire REV gene sequence, and has the highest identity with the integrated REV gene sequence in fowlpox virus.
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Affiliation(s)
- Huadong Liu
- College of Animal Science, Shanxi Agricultural University, Taiyuan, 030032, China.
| | - Tingting Li
- College of Animal Science, Shanxi Agricultural University, Taiyuan, 030032, China
| | - Juan Tang
- College of Animal Science, Shanxi Agricultural University, Taiyuan, 030032, China
| | - Shurong Ding
- College of Animal Science, Shanxi Agricultural University, Taiyuan, 030032, China
| | - Dongcai Wang
- College of Animal Science, Shanxi Agricultural University, Taiyuan, 030032, China
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Lv C, Zhao Y, Jiang L, Zhao L, Wu C, Hui X, Hu X, Shao Z, Xia X, Sun X, Zhang Q, Jin M. Development of a Dual ELISA for the Detection of CD2v-Unexpressed Lower-Virulence Mutational ASFV. Life (Basel) 2021; 11:life11111214. [PMID: 34833090 PMCID: PMC8626036 DOI: 10.3390/life11111214] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 11/16/2022] Open
Abstract
African swine fever virus (ASFV) is an important viral pathogen infecting pigs worldwide throughout the pig industry. CD2v (an outer-membrane glycosylated protein of ASFV)-unexpressed lower-virulence mutants have appeared in China and other countries in recent years. Using OIE-recommended quantitative PCR and ELISA methods, people can accurately judge whether pigs are infected with wild-type ASFV. However, the strategy has failed to distinguish ΔCD2v lower-virulence mutants and wild-type ASFV infection. Here, we expressed and purified the CD2v and p30 proteins via CHO cells and successfully established a dual enzyme-linked immunosorbent assay (ELISA), which can be used to differentiate pigs infected with wild-type ASFV or with CD2v-unexpressed lower-virulence mutants. The dual ELISA showed excellent specificity without cross-reactions with antibodies of PRRSV, CSFV, JEV, PRV, or PPV. The dual ELISA could detect ASFV-infected positive serum samples up to dilutions of 5120 times, possessing high sensitivity. Therefore, the application of this dual ELISA approach can play an important role in ASFV epidemiology study and fill the gaps in differential diagnosis.
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Affiliation(s)
- Changjie Lv
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Ya Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Lili Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Li Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Chao Wu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xianfeng Hui
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaotong Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Ziqi Shao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaohan Xia
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Xiaomei Sun
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
| | - Qiang Zhang
- College of Biomedicine and Health, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: (Q.Z.); (M.J.)
| | - Meilin Jin
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; (C.L.); (Y.Z.); (L.J.); (L.Z.); (C.W.); (X.H.); (X.H.); (X.X.); (X.S.)
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
- Correspondence: (Q.Z.); (M.J.)
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