1
|
Yadhapura Venkatesh R, Dey S, Buragohain L, Chellappa MM, Pathak DC, Singh A, Murugasamy R, Manivasagam V, Barman NN. Development of recombinant capsid protein-based single serum dilution ELISA for sero-detection of porcine circovirus type 2 infection in pigs. Vet Res Commun 2024; 48:1149-1159. [PMID: 38214798 DOI: 10.1007/s11259-024-10299-y] [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: 10/31/2023] [Accepted: 01/07/2024] [Indexed: 01/13/2024]
Abstract
Porcine Circovirus 2 (PCV2) is the major causative agent of postweaning multisystemic wasting syndrome (PMWS) of swine and is one of the reasons for severe economic loss in swine industry. In India, there is a considerable prevalence rate of PCV2 infection in pig population, PCV2d being the most prominent genotype. Proper sero-diagnosis and sero-surveillance of the disease is formulated as an effective control measure. In this study, a recombinant capsid protein-based single serum dilution indirect ELISA was developed for determination of antibody titre of the infected pigs. The capsid protein (Cap) of PCV2d was produced in Saccharomyces cerevisiae cells and the capsid protein was purified by affinity chromatography. This recombinant protein was used as a coating antigen to develop a cost effective, highly sensitive and specific single serum dilution ELISA. The in-house developed ELISA was optimized to be used in a 1:200 single serum dilution. The developed ELISA along with a commercial ELISA kit were compared with a sensitive immuno-peroxidase assay (IPMA) by receiver-operating characteristics (ROC) test. Our results showed that the developed single serum dilution ELISA had a higher sensitivity and specificity in comparison to the commercial ELISA. The area under the ROC curve (AUC) also confirmed that the developed ELISA had a better overall diagnostic performance in comparison to the commercial ELISA kit.
Collapse
Affiliation(s)
- Ravishankara Yadhapura Venkatesh
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India
| | - Sohini Dey
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India.
| | - Lukumoni Buragohain
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Guwahati, India
| | - Madhan Mohan Chellappa
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India.
| | - Dinesh Chandra Pathak
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India
| | - Asmita Singh
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India
| | - Rudhreswaran Murugasamy
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India
| | - Vignesh Manivasagam
- Recombinant DNA Laboratory, Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, 243 122, India
| | - Nagendra Nath Barman
- Department of Veterinary Microbiology, College of Veterinary Science, Assam Agricultural University, Guwahati, India
| |
Collapse
|
2
|
Chen S, Li X, Zhang L, Zheng J, Yang L, Niu G, Zhang H, Ren Y, Qian J, Sun C, Ren L. Phylogenetic and Structural Analysis of Porcine Circovirus Type 2 from 2016 to 2021 in Jilin Province, China. Microorganisms 2023; 11:microorganisms11040983. [PMID: 37110406 PMCID: PMC10145682 DOI: 10.3390/microorganisms11040983] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/03/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Porcine circovirus disease (PCVD) caused by porcine circovirus type 2 (PCV2) is widely distributed in pig farms. Up until now, nine genotypes of PCV2, PCV2a to 2i, have been identified in diseased pigs worldwide. This study analyzed 302 samples collected in the Jilin Province of China from 2016 to 2021, followed by genetic analysis of the PCV2 isolates. Meanwhile, the antigen epitopes, amino acid mutations, 3D structure of the PCV2 isolates and commercially available vaccine strains were evaluated and compared. The results showed that the predominant genotypes of PCV2 were PCV2b, followed by PCV2e and PCV2d in Jilin Province during 2016-2021. Although mutations were detected in the isolates, no recombination occurred in the PCV2 isolates, indicating a stable genotype of PCV2 in Jilin Province during these years. Moreover, the B cell epitopes in the Cap and Rep proteins of eighteen PCV2 isolates and T cell epitopes in the Cap of the isolates were changed compared to three currently used vaccine strains. The mutations in the Cap and Rep proteins did not affect their spatial conformation. Therefore, bivalent or multivalent vaccines with different genotypes of PCV2 might improve the protective effect of vaccines.
Collapse
Affiliation(s)
- Si Chen
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Xue Li
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Liying Zhang
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Jiawei Zheng
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Lin Yang
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Guyu Niu
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Huimin Zhang
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Ying Ren
- Public Computer Education and Research Center, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Jing Qian
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Changjiang Sun
- College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| | - Linzhu Ren
- College of Animal Sciences, Key Laboratory for Zoonoses Research, Ministry of Education, Jilin University, 5333 Xi'an Road, Changchun 130062, China
| |
Collapse
|