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296049

Efficacy of the Genotype-Matched and Non-Matched Vaccines Against Newcastle Disease ‎Virus Genotype VII.1.1. Challenge in Broiler Chickens

Article

Last updated: 04 Jan 2025

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Avian disease

Abstract

Despite extensive vaccinations attempts, genotype VII Newcastle disease viruses (NDV) continue to circulate at the Middle East and Asia causing significant economic losses. In this investigation, we assessed the effectiveness of three inactivated NDV vaccines; genotype II NDV,  recombinant genotype VII NDV-matched and laboratory prepared autogenous velogenic NDV genotype VII against challenge by genotype VII velogenic NDV. The following vaccinations were given: group 1(G1) received an inactivated genotype II vaccine, group 2 (G2) received an inactivated recombinant genotype VII NDV-matched vaccine, and group3 (G3) received a velogenic inactivated autogenous NDV genotype VII vaccine. While the live genotype II (Lasota) vaccine was administered to all groups. At the age of 28 days, birds in all vaccination groups were challenged with NDV genotype VII, and protection against infection was assessed based on the mortality number, clinical symptoms, Post mortem lesions, virus shedding, and histological changes. The results of clinical protection were78%, 87% and 96% in vaccinated groups G1, G2 and G3 respectively, against 7 % in the control non-vaccinated challenged group. Virus shedding in all vaccinated groups significantly reduced when compared to the non-vaccinated group (G4). The mean lesion score on 4 and 7 days post challenge were significantly reduced in G3 and G2 compared to G1.In conclusion, more protection against challenge was offered by a velogenic inactivated autogenous NDV genotype VII vaccine that was closely related to genotype VII.1.1 strain than by other vaccines. So we recommended the use of genotype matched vaccine to control NDV in endemic countries.  

DOI

10.21608/jcvr.2023.296049

Keywords

commercial broiler, Genotype-matched vaccine, Genotype VII.1.1 and Newcastle disease virus.‎

Authors

First Name

Elsayed

Last Name

Kamel

MiddleName

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Email

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City

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Orcid

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First Name

Hesham

Last Name

Sultan

MiddleName

-

Affiliation

-

Email

sukkara@gmail.com

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-

Orcid

-

Volume

5

Article Issue

1

Related Issue

40921

Issue Date

2023-04-01

Receive Date

2023-04-20

Publish Date

2023-04-01

Page Start

110

Page End

121

Print ISSN

2636-4018

Online ISSN

2636-4026

Link

https://jcvr.journals.ekb.eg/article_296049.html

Detail API

https://jcvr.journals.ekb.eg/service?article_code=296049

Order

9

Type

Original Article

Type Code

799

Publication Type

Journal

Publication Title

Journal of Current Veterinary Research

Publication Link

https://jcvr.journals.ekb.eg/

MainTitle

Efficacy of the Genotype-Matched and Non-Matched Vaccines Against Newcastle Disease ‎Virus Genotype VII.1.1. Challenge in Broiler Chickens

Details

Type

Article

Created At

24 Dec 2024