Journal
PATHOGENS
Volume 8, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/pathogens8030145
Keywords
newcastle disease virus; avian reovirus-sigma C protein; bivalent vaccine candidate; humoral and cell mediated immune responses; protection efficacy
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Funding
- Department of Biotechnology, Government of India [BT/PR15373/AAQ/57/116/2011, BT/PR21576/ADV/90/249/2016]
- National Agricultural Science Fund, ICAR [NFBSFARA/BS-3010]
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Newcastle disease (ND) and avian reovirus (ARV) infections are a serious threat to the poultry industry, which causes heavy economic losses. The mesogenic NDV strain R2B is commonly used as a booster vaccine in many Asian countries to control the disease. In this seminal work, a recombinant NDV strain R2B expressing the sigma C (sigma C) gene of ARV (rNDV-R2B-sigma C) was generated by reverse genetics, characterized in vitro and tested as a bivalent vaccine candidate in chickens. The recombinant rNDV-R2B-sigma C virus was attenuated as compared to the parent rNDV-R2B virus as revealed by standard pathogenicity assays. The generated vaccine candidate, rNDV-R2B-sigma C, could induce both humoral and cell mediated immune responses in birds and gave complete protection against virulent NDV and ARV challenges. Post-challenge virus shedding analysis revealed a drastic reduction in NDV shed, as compared to unvaccinated birds.
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