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Abstract
The different technology platforms used to make poultry vaccines are reviewed. Vaccines based on classical technologies are either live attenuated or inactivated vaccines. Genetic engineering is applied to design by deletion, mutation, insertion, or chimerization, genetically modified target microorganisms that are used either as live or inactivated vaccines. Other vaccine platforms are based on one or a few genes of the target pathogen agent coding for proteins that can induce a protective immune response ("protective genes"). These genes can be expressed in vitro to produce subunit vaccines. Alternatively, vectors carrying these genes in their genome or nucleic acid-based vaccines will induce protection by in vivo expression of these genes in the vaccinated host. Properties of these different types of vaccines, including advantages and limitations, are reviewed, focusing mainly on vaccines targeting viral diseases and on technologies that succeeded in market authorization.
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Wu M, Zhang Z, Su X, Lu H, Li X, Yuan C, Liu Q, Teng Q, Geri L, Li Z. Biological Characteristics of Infectious Laryngotracheitis Viruses Isolated in China. Viruses 2022; 14:v14061200. [PMID: 35746670 PMCID: PMC9227991 DOI: 10.3390/v14061200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/27/2022] [Accepted: 05/28/2022] [Indexed: 02/04/2023] Open
Abstract
Infectious laryngotracheitis virus (ILTV) causes severe respiratory disease in chickens and results in huge economic losses in the poultry industry worldwide. To correlate the genomic difference with the replication and pathogenicity, phenotypes of three ILTVs isolated from chickens in China from 2016 to 2018 were sequenced by high-throughput sequencing. Based on the entire genome, the isolates GD2018 and SH2017 shared 99.9% nucleotide homology, while the isolate SH2016 shared 99.7% nucleotide homology with GD2018 and SH2017, respectively. Each virus genome contained 82 ORFs encoding 77 kinds of protein, 31 of which share the same amino acid sequence in the three viruses. GD2018 and SH2017 shared 57 proteins with the same amino acid sequence, while SH2016 shared 42 and 41 proteins with the amino acid sequences of GD2018 and SH2017, respectively. SH2016 propagated efficiently in allantoic fluid and on chorioallantoic membranes (CAMs) of SPF chicken embryo eggs, while GD2018 and SH2017 proliferated well only on CAMs. GD2018 propagated most efficiently on CAMs and LMH cells among three isolates. SH2016 caused serious clinical symptoms, while GD2018 and SH2017 caused mild and moderate clinical symptoms in chickens, although the sero of the chickens infected with those three isolates were all positive for anti-ILTV antibody at 14 and 21 days after challenge. Three ILTVs with high genetic homology showed significant differences in the replication in different culture systems and the pathogenicity of chickens, providing basic materials for studying the key determinants of pathogenicity of ILTV.
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Affiliation(s)
- Mi Wu
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010010, China; (M.W.); (H.L.)
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Zhifei Zhang
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Xin Su
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Haipeng Lu
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010010, China; (M.W.); (H.L.)
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Xuesong Li
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Chunxiu Yuan
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Qinfang Liu
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Qiaoyang Teng
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
| | - Letu Geri
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010010, China; (M.W.); (H.L.)
- Correspondence: (L.G.); (Z.L.)
| | - Zejun Li
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010010, China; (M.W.); (H.L.)
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China; (Z.Z.); (X.S.); (X.L.); (C.Y.); (Q.L.); (Q.T.)
- Correspondence: (L.G.); (Z.L.)
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Zhao J, Zhang R, Zhu L, Deng H, Li F, Xu L, Huan J, Sun X, Xu Z. Establishment of a peptide-based enzyme-linked immunosorbent assay for detecting antibodies against PRRSV M protein. BMC Vet Res 2021; 17:355. [PMID: 34798885 PMCID: PMC8602981 DOI: 10.1186/s12917-021-03060-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/31/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Porcine reproductive and respiratory syndrome (PRRS) is one of the most economically devastating diseases affecting the swine industry globally. Evaluation of antibody responses and neutralizing antibody titers is the most effective method for vaccine evaluation. In this study, the B cell line epitopes of PRRSV M protein were predicted, and two peptide ELISA assays were established (M-A110-129 ELISA, M-A148-174 ELISA) to detect antibodies against PRRSV M protein. Field serum samples collected from pig farms were used to validate the peptide ELISA and compare it with an indirect immunofluorescence assay. RESULTS The sensitivity and specificity of M-A110-129 ELISA and M-A148-174 ELISA were (111/125) 88.80%, (69/70) 98.57% and (122/125) 97.60%, (70/70) 100%, relative to indirect immunofluorescence assay. This peptide ELISA could detect antibodies against different genotypes of PRRSV including type 1 PRRSV, classical PRRSV, HP-PRRSV, and NADC30 like PRRSV, but not antibodies against other common swine viruses. The results of ROC analysis showed that the area under the curve (AUC) of the M-A110-129 ELISA and M-A148-174 ELISA were 0.967 and 0.996, respectively. Compared the concordance of results using two peptide ELISA assays, the IDEXX PRRSV X3 Ab ELISA and a virus neutralization test, were assessed using a series of 147 sera from pigs vaccinated with the NADC30-like PRRSV inactivated vaccine. The M-A148-174 ELISA had the best consistency, with a Cohen's kappa coefficient of 0.8772. The concordance rates of the Hipra PRRSV ELISA kit, M-A110-129 ELISA and M-A148-174 ELISA in the field seropositive detection results were 91.08, 86.32 and 95.35%, relative to indirect immunofluorescence assay. CONCLUSIONS In summary, compared with M-A110-129 ELISA, the PRRSV M-A148-174 ELISA is of value for detecting antibodies against PRRSV and the evaluation of the NADC30-like PRRSV inactivated vaccine, but the advantage is insufficient in serological early diagnosis.
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Affiliation(s)
- Jun Zhao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Rubo Zhang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Ling Zhu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.,Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, 611130, China
| | - Huidan Deng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.,Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, 611130, China
| | - Fengqing Li
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.,College of Animal Science, Xichang University, Xichang, 615000, Sichuan, China
| | - Lei Xu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jianbo Huan
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiangang Sun
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China.,Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, 611130, China
| | - Zhiwen Xu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China. .,Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, 611130, China.
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Tomar P, Joshi VG, Mahajan NK, Jindal N. Multiple antigenic peptide-based flow through dot-blot assay for simultaneous antibody detection of infectious bronchitis virus and Newcastle disease virus. Biologicals 2021; 73:24-30. [PMID: 34389244 DOI: 10.1016/j.biologicals.2021.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/26/2021] [Accepted: 07/30/2021] [Indexed: 11/19/2022] Open
Abstract
The present study describes the development of a novel affordable and rapid visual dot-blot assay using synthetic multiple antigenic peptides (MAP) for simultaneous detection of antibodies to infectious bronchitis virus (IBV) and Newcastle disease virus (NDV). Antibody detection efficiencies of MAP peptides namely, NP1 MAP (Nucleoprotein IBV) and HN MAP (Haemagglutinin-neuraminidase NDV) were studied in solid-phase indirect peptide ELISA. In comparison with the commercial kit, the NP1 MAP showed 89.20% diagnostic sensitivity (DSn) and 85.90% diagnostic specificity (DSp) at 19.45% ROC cut-off. Similarly, HN MAP was evaluated and showed 89.70% DSn and 92.90% DSp at 19.90 % ROC cut-off. The peptides after evaluating their ELISA performance were further used to device a flow-through dot-blot assay (FT-DBA) for simultaneous detection of IBV and NDV antibodies. The kappa value for IBV by FT-DBA in comparison to commercial ELISA was 0.64 whereas for NDV, FT-DBA gave a kappa value of 0.68 in comparison to commercial ELISA indicating substantial agreement between the assays. In essence, the divergent MAP based diagnostic design could provide an alternative for antibody detection of IBV and NDV. Further, the FT-DBA approach could be used for low cost, rapid and pen-side detection of IBV and NDV antibodies simultaneously.
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Affiliation(s)
- Piyush Tomar
- Department of Veterinary Public Health and Epidemiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Vinay G Joshi
- Department of Animal Biotechnology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - N K Mahajan
- Department of Veterinary Public Health and Epidemiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Naresh Jindal
- Department of Veterinary Public Health and Epidemiology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India.
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Gowthaman V, Kumar S, Koul M, Dave U, Murthy TRGK, Munuswamy P, Tiwari R, Karthik K, Dhama K, Michalak I, Joshi SK. Infectious laryngotracheitis: Etiology, epidemiology, pathobiology, and advances in diagnosis and control - a comprehensive review. Vet Q 2021; 40:140-161. [PMID: 32315579 PMCID: PMC7241549 DOI: 10.1080/01652176.2020.1759845] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Infectious laryngotracheitis (ILT) is a highly contagious upper respiratory tract disease of chicken caused by a Gallid herpesvirus 1 (GaHV-1) belonging to the genus Iltovirus, and subfamily Alphaherpesvirinae within Herpesviridae family. The disease is characterized by conjunctivitis, sinusitis, oculo-nasal discharge, respiratory distress, bloody mucus, swollen orbital sinuses, high morbidity, considerable mortality and decreased egg production. It is well established in highly dense poultry producing areas of the world due to characteristic latency and carrier status of the virus. Co-infections with other respiratory pathogens and environmental factors adversely affect the respiratory system and prolong the course of the disease. Latently infected chickens are the primary source of ILT virus (ILTV) outbreaks irrespective of vaccination. Apart from conventional diagnostic methods including isolation and identification of ILTV, serological detection, advanced biotechnological tools such as PCR, quantitative real-time PCR, next generation sequencing, and others are being used in accurate diagnosis and epidemiological studies of ILTV. Vaccination is followed with the use of conventional vaccines including modified live attenuated ILTV vaccines, and advanced recombinant vector vaccines expressing different ILTV glycoproteins, but still these candidates frequently fail to reduce challenge virus shedding. Some herbal components have proved to be beneficial in reducing the severity of the clinical disease. The present review discusses ILT with respect to its current status, virus characteristics, epidemiology, transmission, pathobiology, and advances in diagnosis, vaccination and control strategies to counter this important disease of poultry.
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Affiliation(s)
- Vasudevan Gowthaman
- Poultry Disease Diagnosis and Surveillance Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Namakkal, Tamil Nadu, India
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Monika Koul
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Urmil Dave
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - T R Gopala Krishna Murthy
- Poultry Disease Diagnosis and Surveillance Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Namakkal, Tamil Nadu, India
| | - Palanivelu Munuswamy
- Division of Pathology, ICAR - Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India
| | - Ruchi Tiwari
- Department of Veterinary Microbiology and Immunology, College of Veterinary Sciences, UP Pandit Deen Dayal Upadhayay Pashu Chikitsa Vigyan Vishwavidyalay Evum Go-Anusandhan Sansthan (DUVASU), Mathura, Uttar Pradesh, India
| | - Kumaragurubaran Karthik
- Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Chennai, Tamil Nadu, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR - Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India
| | - Izabela Michalak
- Faculty of Chemistry, Department of Advanced Material Technologies, Wrocław University of Science and Technology, Wrocław, Poland
| | - Sunil K Joshi
- Department of Microbiology & Immunology, Department of Pediatrics, Division of Hematology, Oncology and Bone Marrow Transplantation, University of Miami School of Medicine, Miami, Florida, USA
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Chen S, Xu N, Ta L, Li S, Su X, Xue J, Du Y, Qin T, Peng D. Recombinant Fowlpox Virus Expressing gB Gene from Predominantly Epidemic Infectious Larygnotracheitis Virus Strain Demonstrates Better Immune Protection in SPF Chickens. Vaccines (Basel) 2020; 8:vaccines8040623. [PMID: 33105740 PMCID: PMC7711474 DOI: 10.3390/vaccines8040623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/07/2020] [Accepted: 10/08/2020] [Indexed: 02/06/2023] Open
Abstract
Background: Infectious laryngotracheitis (ILT) is a highly contagious acute respiratory disease of chickens. Antigenic mutation of infectious laryngotracheitis virus (ILTV) may result in a vaccination failure in the poultry industry and thus a protective vaccine against predominant ILTV strains is highly desirable. Methods: The full-length glycoprotein B (gB) gene of ILTV with the two mutated synonymous sites of fowlpox virus (FPV) transcription termination signal sequence was cloned into the insertion vector p12LS, which was co-transfected with wild-type (wt) FPV into chicken embryo fibroblast (CEF) to develop a recombinant fowlpox virus-gB (rFPV-gB) candidate vaccine strain. Furthermore, its biological and immunological characteristics were evaluated. Results: The results indicated that gB gene was expressed correctly in the rFPV by indirect immunofluorescent assay and Western blot, and the rFPV-gB provided a 100% protection in immunized chickens against the challenge of predominant ILTV strains that were screened by pathogenicity assay when compared with the commercialized rFPV vaccine, which only provided 83.3%. Conclusion: rFPV-gB can be used as a potential vaccine against predominant ILTV strains.
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Affiliation(s)
- Sujuan Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Nuo Xu
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Lei Ta
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Shi Li
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Xiang Su
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Jing Xue
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Yinping Du
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Tao Qin
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
| | - Daxin Peng
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (S.C.); (N.X.); (L.T.); (S.L.); (X.S.); (J.X.); (Y.D.); (T.Q.)
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou University, Yangzhou 225009, China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou University, Yangzhou 225009, China
- Correspondence: ; Tel./Fax: +86-051487979386
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A bio-safe multiple antigenic peptide (MAP) enzyme-linked immunoassay for the detection of antibodies to infectious bronchitis virus in chickens. 3 Biotech 2020; 10:437. [PMID: 32999814 DOI: 10.1007/s13205-020-02422-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/31/2020] [Indexed: 12/17/2022] Open
Abstract
The objective of the study was to develop a bio-safe synthetic peptide ELISA for the detection of antibodies against the infectious bronchitis virus (IBV) using a novel multiple antigenic peptide approach (MAP). After initial ELISA optimization, diagnostic sensitivity (DSn) and specificity (DSp) for the linear peptides were determined using receiver operator curve (ROC) analysis. The peptide IBVP1 showed 90.44% DSn and 88.64% DSp at ROC cut off 22.8% while IBVP2 showed 88.24% DSn and 85.23% DSp at ROC cut off 23.05%. The multimerization of linear peptides to MAP design resulted in the improvement of the diagnostic efficiency up to 94.85% DSn and 92.05% DSp for IBVM1 with 19.95% cut off. A similar improvement in the performance was also observed with 92.65% DSn and 90.91% DSp for IBVM2 at 20.72% cut off. All the peptides were tested for diagnostic specificity and did not show the cross-reactivity with Newcastle disease virus and infectious bursal disease virus positive serum samples. In addition, repeatability testing for all linear and multimeric peptide showed that the coefficient of variation for intra-assay was within the expected limits, ranging from 2.4 to 10.4% and inter-assay coefficient of variation was ranging from 5.56 to 14.3%. In a nutshell, the present study used predicted B cell epitope, the synthetic peptide in linear and multimeric design for IBV antibody detection. The study also highlights peptide antigen with modified scaffold design could be a safe alternative to whole virion-based ELISA for IBV antibody detection.
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