Type-specific seroprevalence of bluetongue in India during 2018 and 2019

Vet World Vol.13 October-2020 Article-7

Research Article

Veterinary World, 13(10): 2092-2096

https://doi.org/10.14202/vetworld.2020.2092-2096

G. Naresh¹, Kalyani Putty¹, Y. Narasimha Reddy¹, and Y. Krishna Jyothi²

1. Department of Veterinary Biotechnology, College of Veterinary Science, P. V. N. R. Telangana Veterinary University, Hyderabad, Telangana, India.
2. Department of Animal Husbandry, Andhra Pradesh Veterinary Biological Research Institute, Vijayawada, Andhra Pradesh, India.

Background and Aim: Bluetongue (BT) is a major disease of sheep and goats and is endemic to India. It is known to cause significant economic losses to the sheep industry. The current study aimed to determine the type-specific seroprevalence of BT in sheep population of India during 2018-2019.

Materials and Methods: Blood samples (n=405) were collected from 6 months to 1 year old sheep from six districts (Nalgonda, Karimnagar, Khammam, Mahabubnagar, Warangal, and Ranga Reddy) of Telangana state, India. Group- and type-specific seroprevalence (against BT virus [BTV] serotypes BTV-1, 2, 4, 5, 9, 10, 12, 16, 21, 23, and 24) was studied by competitive enzyme-linked immunosorbent assay and serum neutralization test, respectively.

Results: Results showed an overall seroprevalence of 14.81% (n=60) with the highest seroprevalence of 50% in Khammam district. Seroprevalence of BTV-1, 2, 4, 5, 9, 10, 12, 16, 21, 23, and 24 was noted as 16.66%, 11.66%, 31.66%, 11.66%, 05%, 6.66%, 16.66%, 8.33%, 13.33%, 6.66%, and 16.66%, respectively. The majority of the sera neutralized more than 1 serotype, indicating superinfection or circulation of multiple serotypes in the sampled flocks. This mixed seroprevalence was observed in 43.33% of the sera with number of BTV serotype-specific antibodies ranging from two to eight in individual animals.

Conclusion: Regular monitoring of circulating serotypes, especially in young herds, elucidates pattern of dominating serotypes in a particular area during a season. This knowledge can be applied to design appropriate vaccination strategies by including particular serotypes of virus as part of a multivalent vaccine for a particular period, in a particular area. Keywords: Bluetongue, competitive enzyme-linked immunosorbent assay, serum neutralization test, type-specific seroprevalence.

Keywords: Bluetongue, competitive enzyme-linked immunosorbent assay, serum neutralization test, type-specific seroprevalence.

How to cite this article: Naresh G, Putty K, Reddy YN, Jyothi YK (2020) Type-specific seroprevalence of bluetongue in India during 2018 and 2019, Veterinary World, 13(10): 2092-2096.

Received: 29-01-2020 Accepted: 24-08-2020 Published online: 05-10-2020

Corresponding author: Kalyani Putty E-mail: kalyaniputty@gmail.com

DOI: 10.14202/vetworld.2020.2092-2096

Copyright: Naresh, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.