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A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies

Newcastle Disease is one of the most important infectious poultry diseases worldwide and is associated with high morbidity, mortality, and economic loss. In several countries, vaccination is applied to prevent and control outbreaks; however, information on the ability of vaccines to reduce transmiss...

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Autores principales: Tatár-Kis, Timea, Fischer, Egil A.J., Cazaban, Christophe, Walkó-Kovács, Edit, Homonnay, Zalan G., Velkers, Francisca C., Palya, Vilmos, Stegeman, J. Arjan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720113/
https://www.ncbi.nlm.nih.gov/pubmed/33081359
http://dx.doi.org/10.3390/vaccines8040614
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author Tatár-Kis, Timea
Fischer, Egil A.J.
Cazaban, Christophe
Walkó-Kovács, Edit
Homonnay, Zalan G.
Velkers, Francisca C.
Palya, Vilmos
Stegeman, J. Arjan
author_facet Tatár-Kis, Timea
Fischer, Egil A.J.
Cazaban, Christophe
Walkó-Kovács, Edit
Homonnay, Zalan G.
Velkers, Francisca C.
Palya, Vilmos
Stegeman, J. Arjan
author_sort Tatár-Kis, Timea
collection PubMed
description Newcastle Disease is one of the most important infectious poultry diseases worldwide and is associated with high morbidity, mortality, and economic loss. In several countries, vaccination is applied to prevent and control outbreaks; however, information on the ability of vaccines to reduce transmission of ND virus (NDV) is sparse. Here we quantified the transmission of velogenic NDV among 42-day-old broilers. Chickens were either vaccinated with a single dose of a vector vaccine expressing the F protein (rHVT-ND) at day-old in the presence of maternally derived antibodies or kept unvaccinated. Seeders were challenged 8 h before the co-mingling with the corresponding contacts from the same group. Infection was monitored by daily testing of cloacal and oro-nasal swabs with reverse transcription-real-time PCR and by serology. Vaccinated birds were completely protected against clinical disease and virus excretion was significantly reduced compared to the unvaccinated controls that all died during the experiment. The reproduction ratio, which is the average number of secondary infections caused by an infectious bird, was significantly lower in the vaccinated group (0.82 (95% CI 0.38–1.75)) than in the unvaccinated group (3.2 (95% CI 2.06–4.96)). Results of this study demonstrate the potential of rHVT-ND vaccine in prevention and control of ND outbreaks.
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spelling pubmed-77201132020-12-08 A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies Tatár-Kis, Timea Fischer, Egil A.J. Cazaban, Christophe Walkó-Kovács, Edit Homonnay, Zalan G. Velkers, Francisca C. Palya, Vilmos Stegeman, J. Arjan Vaccines (Basel) Article Newcastle Disease is one of the most important infectious poultry diseases worldwide and is associated with high morbidity, mortality, and economic loss. In several countries, vaccination is applied to prevent and control outbreaks; however, information on the ability of vaccines to reduce transmission of ND virus (NDV) is sparse. Here we quantified the transmission of velogenic NDV among 42-day-old broilers. Chickens were either vaccinated with a single dose of a vector vaccine expressing the F protein (rHVT-ND) at day-old in the presence of maternally derived antibodies or kept unvaccinated. Seeders were challenged 8 h before the co-mingling with the corresponding contacts from the same group. Infection was monitored by daily testing of cloacal and oro-nasal swabs with reverse transcription-real-time PCR and by serology. Vaccinated birds were completely protected against clinical disease and virus excretion was significantly reduced compared to the unvaccinated controls that all died during the experiment. The reproduction ratio, which is the average number of secondary infections caused by an infectious bird, was significantly lower in the vaccinated group (0.82 (95% CI 0.38–1.75)) than in the unvaccinated group (3.2 (95% CI 2.06–4.96)). Results of this study demonstrate the potential of rHVT-ND vaccine in prevention and control of ND outbreaks. MDPI 2020-10-16 /pmc/articles/PMC7720113/ /pubmed/33081359 http://dx.doi.org/10.3390/vaccines8040614 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tatár-Kis, Timea
Fischer, Egil A.J.
Cazaban, Christophe
Walkó-Kovács, Edit
Homonnay, Zalan G.
Velkers, Francisca C.
Palya, Vilmos
Stegeman, J. Arjan
A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title_full A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title_fullStr A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title_full_unstemmed A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title_short A Herpesvirus of Turkey-Based Vector Vaccine Reduces Transmission of Newcastle Disease Virus in Commercial Broiler Chickens with Maternally Derived Antibodies
title_sort herpesvirus of turkey-based vector vaccine reduces transmission of newcastle disease virus in commercial broiler chickens with maternally derived antibodies
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720113/
https://www.ncbi.nlm.nih.gov/pubmed/33081359
http://dx.doi.org/10.3390/vaccines8040614
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