1
|
Mahapatra CS, Sharma P, Biswas SK, Chand K. Development of ELISA for the detection of antibodies against VP2 protein of bluetongue virus serotype-1. J Immunol Methods 2022; 511:113386. [PMID: 36384199 DOI: 10.1016/j.jim.2022.113386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 09/23/2022] [Accepted: 11/10/2022] [Indexed: 11/14/2022]
Abstract
Serotype-specific diagnosis of bluetongue virus (BTV) is necessary for sero-surveillance and taking effective control measures. The VP2 is the major serotype determining protein and BTV-1 is the most predominant serotype in India. In the present study, an indirect ELISA (i-ELISA) was optimized for the detection of serotype-specific antibody against BTV-1 serotype. The VP2 protein of BTV-1 was expressed in a prokaryotic expression system and used to optimize i-ELISA to detect VP2 antibodies of BTV-1 in serum samples of both small and large ruminants. Serum samples (n = 363) classified as positive and negative for antibodies to BTV-1 by serum neutralization test (SNT) and also positive and negative for BTV antibodies by c-ELSIA kit (VMRD, USA) were used to determine the cut-off value, diagnostic sensitivity (DSn), and diagnostic specificity (D-Sp) using receiver operating characteristic (ROC) analysis. The percent positivity (PP) value >30.10% was accepted as the cut-off for i-ELISA at which DSn of 99.52% and D-Sp of 99.35% was observed with a 95% confidence interval. Further, there was no cross-reactivity with other available BTV serotypes in the country. The study indicated serotype-specific i-ELISA is sensitive, specific and suitable alternative to tedious SNT method for determining serotype. The assay will also help in the serotype-specific epidemiological studies and implementation of future control strategies including vaccination and selection of suitable serotype as a vaccine candidate.
Collapse
Affiliation(s)
- Chayna Singha Mahapatra
- Division of Virology, ICAR-Indian Veterinary Research Institute, Mukteswar Campus, 263138 Nainital, Uttarakhand, India
| | - Priya Sharma
- Division of Virology, ICAR-Indian Veterinary Research Institute, Mukteswar Campus, 263138 Nainital, Uttarakhand, India
| | - Sanchay Kumar Biswas
- Division of Virology, ICAR-Indian Veterinary Research Institute, Mukteswar Campus, 263138 Nainital, Uttarakhand, India
| | - Karam Chand
- Division of Virology, ICAR-Indian Veterinary Research Institute, Mukteswar Campus, 263138 Nainital, Uttarakhand, India.
| |
Collapse
|
2
|
Thota R, Ganji VK, Machanagari S, Yella NR, Buddala B, Yadlapati K, Rao PP, Maan S, Maan NS, Hemadri D, Singh KP, Putty K. VP2 Gene-Based Molecular Evolutionary Patterns of Major Circulating Bluetongue Virus Serotypes Isolated during 2014-2018 from Telangana and Andhra Pradesh States of India. Intervirology 2020; 64:1-8. [PMID: 33378762 DOI: 10.1159/000512131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 10/05/2020] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Bluetongue disease is an economically important viral disease of livestock caused by bluetongue virus (BTV) having multiple serotypes. It belongs to the genus Orbivirus of family Reoviridae and subfamily Sedoreovirinae. The genome of BTV is 10 segmented dsRNA that codes for 7 structural and 4 nonstructural proteins, of which VP2 was reported to be serotype-specific and a major antigenic determinant. OBJECTIVE It is important to know the circulating serotypes in a particular geographical location for effective control of the disease. The present study unravels the molecular evolution of the circulating BTV serotypes during 2014-2018 in Telangana and Andhra Pradesh states of India. METHODS Multiple sequence alignment with available BTV serotypes in GenBank and phylogenetic analysis were performed for the partial VP2 sequences of major circulating BTV serotypes during the study period. RESULTS The multiple sequence alignment of circulating serotypes with respective reference isolates revealed variations in antigenic VP2. The phylogenetic analysis revealed that the major circulating serotypes were grouped into eastern topotypes (BTV-1, BTV-2, BTV-4, and BTV-16) and Western topotypes (BTV-5, BTV-12, and BTV-24). CONCLUSION Our study strengthens the need for development of an effective vaccine, which can induce the immune response for a range of serotypes within and in between topotypes.
Collapse
Affiliation(s)
- Ravali Thota
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India
| | - Vishweshwar Kumar Ganji
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India
| | - Sharanya Machanagari
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India
| | - Narasimha Reddy Yella
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India
| | - Bhagyalakshmi Buddala
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India
| | | | | | - Sushila Maan
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Narender S Maan
- College of Veterinary Sciences, LLR University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | | | - Karam Pal Singh
- Pathology Laboratory, CADRAD, ICAR-IVRI, Izatnagar, Bareilly, India
| | - Kalyani Putty
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, India,
| |
Collapse
|
3
|
Ain KU, Biswas SK, Inbaraj S, Chand K, Saxena A, Ramakrishnan MA, Sunder J, Kundu A, Pandey AB. Deciphering type-specific neutralizing antibodies to bluetongue virus in goats of Andaman and Nicobar Islands, India. Trop Anim Health Prod 2020; 52:2715-2719. [PMID: 32100170 DOI: 10.1007/s11250-020-02237-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 02/13/2020] [Indexed: 11/25/2022]
Abstract
The presence of antibodies to bluetongue virus (BTV) and the viral antigen is reported recently from the Andaman and Nicobar Islands, a group of islands at the juncture of the Bay of Bengal and the Andaman Sea. A retrospective study was conducted to investigate the presence of neutralizing antibodies to different BTV serotypes in the seroconverted goats of the Islands. Thirty six samples out of 186 serum samples tested were selected on the basis of high antibody titre as predicted in an indirect ELISA. Each of the selected serum samples was used for neutralization of six BTV serotypes (BTV-1, BTV-2, BTV-9, BTV-10, BTV-16 and BTV-23), the most commonly reported serotypes in India. Out of 36 serum samples used in the neutralization study, neutralizing antibodies could be determined in 15 samples. The neutralizing antibodies to BTV-10 were found in more number of the serum samples followed by BTV-1, BTV-2 and BTV-23 and BTV-9 and BTV-16. Many of the serum samples could neutralize more than one BTV serotypes indicating possible widespread superinfections by multiple BTV serotypes in goats in the Islands. Majority of the serum samples used in the neutralization study could not neutralize any of the six BTV serotypes commonly reported from India indicating possible circulation of other BTV serotypes yet to confirm. The present study reveals circulation of multiple BTV serotypes in Andaman and Nicobar Islands where there was no such report available earlier. The findings are laudable as the baseline information for further investigations to identify and characterize the virus and competent vectors and for implementing appropriate suitable control strategies for bluetongue in the Islands and the nearby territories.
Collapse
Affiliation(s)
- Kurat Ul Ain
- ICAR-Indian Veterinary Research Institute, Mukteswar, Kumaon, Nainital, Uttarakhand, India
| | - Sanchay Kumar Biswas
- ICAR-Indian Veterinary Research Institute, Mukteswar, Kumaon, Nainital, Uttarakhand, India.
| | - Sophia Inbaraj
- ICAR- Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Karam Chand
- ICAR-Indian Veterinary Research Institute, Mukteswar, Kumaon, Nainital, Uttarakhand, India
| | - Arpit Saxena
- ICAR-Indian Veterinary Research Institute, Mukteswar, Kumaon, Nainital, Uttarakhand, India
| | | | - Jai Sunder
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Anandamoy Kundu
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Awadh Bihari Pandey
- ICAR- Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| |
Collapse
|
4
|
Saxena A, Biswas SK, Chand K, Chauhan A, Mohd G, Subramaniam S, Naskar J, Mondal B, Ramakrishnan MA, Pandey AB. Genetic characterization and ex-vivo neutralization behavior of bluetongue virus serotype-16 recovered from apparently healthy goat. Acta Trop 2019; 194:13-22. [PMID: 30876937 DOI: 10.1016/j.actatropica.2019.03.018] [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: 12/28/2018] [Revised: 02/25/2019] [Accepted: 03/11/2019] [Indexed: 11/29/2022]
Abstract
Bluetongue virus (BTV) infects almost all the domestic and wild ruminants though the clinical disease is most commonly reported in sheep and some species of deer. Goat and cattle are the most common asymptomatic reservoir of the virus. Full genome sequencing and serological characterization of the virus isolates are emphasized for understanding the phylogenetic relationship and molecular epidemiology of bluetongue (BT). In this study, we report phylogenetic and phenotypic antigenic relationship of a BTV serotype-16 (PDP2/13/Ind) recovered from an apparently healthy goat from the state of Uttarakhand, a hilly terrain of sub-Himalayan India with four other BTV-16 isolates. The full genome sequence data was analyzed and the phylogenetic relationship of the goat isolate with other BTV-16 was established. Phylogenetic analysis revealed cluster of PDP2/13/Ind along with other Indian BTV-16 isolates indicating their close ancestral relationship. A cohesive ancestral relationship, irrespective of the genome segments analyzed, was also observed between Indian and Mediterranean BTV-16. The mean substitution rate of different segments of BTV-16 isolates varied from 3.231 × 10-5 (seg-2) to 1.129 × 10-3 (seg-6) substitutions per site per year. Timescale analysis indicated that all the segments had an older ancestor. No statistically significant geographic structuring of BTV-16 isolates was observed indicating frequent gene flow. The goat isolate shares highest identity (99.5%-99.8%) with G53/ABT/HSR, a BTV-16 recovered from the western part of the country whereas high level of divergence (11.9%-33.3%) at genomic segment level was observed with a Nigerian BTV-16 (NIG1982/10). Phenotypic antigenic relationship (r) of PDP2/13/Ind with other isolate-specific hyperimmune serum (HIS) determined from serum neutralization titer was 0.672 ± 0.058 to 0.948 ± 0.09. On other hand, the calculated 'r' score was 0.636 ± 0.063 to 0.814 ± 0.201 when HIS against PDP2/13/Ind was used to neutralize the other BTV-16 isolates. The percentage antigenic similarity (R) of the PDP2/13/Ind with other BTV-16 isolates was 65.39 ± 5.38-87.67 ± 14.86. Data suggests presence of subtype antigenic variation amongst the BTV-16 isolates recovered from the goats of a geographically restricted area of the state of Uttarakhand, India.
Collapse
Affiliation(s)
- Arpit Saxena
- Division of Virology, Indian Veterinary Research Institute Mukteswar, Nainital, Uttarakhand, 263 138, India; Department of Molecular and Cellular Engineering, Sam Higginbottom University of Agriculture Technology and Sciences Allahabad, Uttar Pradesh, 211 007, India
| | - Sanchay Kumar Biswas
- Division of Virology, Indian Veterinary Research Institute Mukteswar, Nainital, Uttarakhand, 263 138, India.
| | - Karam Chand
- Division of Virology, Indian Veterinary Research Institute Mukteswar, Nainital, Uttarakhand, 263 138, India
| | - Ankita Chauhan
- Division of Virology, Indian Veterinary Research Institute Mukteswar, Nainital, Uttarakhand, 263 138, India
| | - Gulam Mohd
- Division of Biological standardization, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, 243122, India
| | - Saravanan Subramaniam
- ICAR-Directorate of Foot and Mouth Disease, Mukteswar, Nainital, Uttarakhand, 263 138, India
| | - Jishnu Naskar
- Department of Molecular and Cellular Engineering, Sam Higginbottom University of Agriculture Technology and Sciences Allahabad, Uttar Pradesh, 211 007, India
| | - Bimalendu Mondal
- Eastern Regional Station, Indian Veterinary Research Institute, Kolkata, West Bengal, 700 037, India
| | - Muthannan A Ramakrishnan
- Division of Virology, Indian Veterinary Research Institute Mukteswar, Nainital, Uttarakhand, 263 138, India
| | - Awadh Bihari Pandey
- Division of Biological standardization, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, 243122, India
| |
Collapse
|