424915

EFFECTIVENESS OF SINGLE AND DOUBLE RECOMBINANT HERPES VIRUS OF TURKEY VECTORED VACCINES BOOSTERED WITH LIVE ND VACCINE AGAINST THE HIGHLY PATHOGENIC NEWCASTLE DISEASE VIRUS GENOT

Article

Last updated: 04 May 2025

Subjects

-

Tags

Avian / Rabbit diseases

Abstract

This study assesses the effectiveness of recombinant Newcastle disease vaccine formulations in one-day-old specific pathogen-free (SPF) chicks, with an emphasis on their performance against the current circulating NDV strain (Egypt-NDV-RLQP-2021) in Egypt. A total of 100 SPF chicks were divided into five groups; Group 1 received INNOVAX-ND-IBD®, Group 2 was given Vaxxitek ® HVT + IBD + ND, and Group 3 was vaccinated by Vectormune® ND, which utilized the herpesvirus of turkeys (HVT) as a vector by integrating the fusion (F) gene from Newcastle disease virus (NDV) into the HVT genome. Vaccinated groups received a single dose of live clone NDV genotype II vaccine at 15 days of age via intraocular instillation. Group 4 was kept as the positive control (no vaccination, challenged with NDV), and Group 5 was the negative control. Groups 1, 2, 3, and 4 were challenged 28 days later with virulent NDV genotype 7 with 0.2 mL 106 EID50 of a challenge virus intramuscularly. Chicks were monitored for clinical signs, mortality, and viral shedding using real-time PCR. Histopathological findings proved that all vaccinated groups showed good control in masking and preventing lesions compared to the positive control group 4. Serology examinations indicated a significant increase in antibody titer post-vaccination and challenge in all vaccinated groups, giving a protective immunity against NDV. For viral shedding, Group 2 showed no detectable virus at any time, which means superior control for viral shedding. In conclusion, our study highly recommends HVT-based vaccines together with NDV live vaccines, as they exhibited full clinical protection against NDV genotype VII.

DOI

10.21608/avmj.2025.336643.1477

Keywords

Newcastle, Vector vaccine, genotype VII, SPF chicks

Authors

First Name

A.

Last Name

HAMZA

MiddleName

S.

Affiliation

Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Qalyubia, Egypt

Email

abdelhamed.hamza@hotmail.com

City

-

Orcid

-

First Name

E.

Last Name

ELBORAAY

MiddleName

M.

Affiliation

Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Qalyubia, Egypt

Email

-

City

-

Orcid

-

First Name

H.

Last Name

ATTIA

MiddleName

F.

Affiliation

Histology Department, Faculty of Veterinary Medicine, Benha University, Egypt

Email

-

City

-

Orcid

-

First Name

A.

Last Name

HELAL

MiddleName

M.

Affiliation

Central Laboratory for Evaluation of Veterinary Biologics. Agriculture Research Centre

Email

-

City

-

Orcid

-

Volume

71

Article Issue

185

Related Issue

55112

Issue Date

2025-04-01

Receive Date

2024-11-16

Publish Date

2025-04-01

Page Start

463

Page End

481

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_424915.html

Detail API

http://journals.ekb.eg?_action=service&article_code=424915

Order

424,915

Type

Case report

Type Code

1,842

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

https://avmj.journals.ekb.eg/

MainTitle

EFFECTIVENESS OF SINGLE AND DOUBLE RECOMBINANT HERPES VIRUS OF TURKEY VECTORED VACCINES BOOSTERED WITH LIVE ND VACCINE AGAINST THE HIGHLY PATHOGENIC NEWCASTLE DISEASE VIRUS GENOT

Details

Type

Article

Created At

04 May 2025