Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Protective effectiveness of two vaccination schemes against the prevalent Egyptian strain of Newcastle disease virus genotype VII
Faculty
Veterinary Medicine
Year:
2024
Type of Publication:
ZU Hosted
Pages:
Authors:
Nora Mohamed Abdelaziz Sadawy
Staff Zu Site
Abstract In Staff Site
Journal:
Open Veterinary Journal Faculty of Veterinary Medicine, University of Tripoli, Libya
Volume:
Keywords :
Protective effectiveness , , vaccination schemes against the prevalent
Abstract:
Background: Despite the strict preventive immunization used in Egypt, Newcastle disease remained a prospective risk to the commercial and backyard chicken industries. The severe economic losses caused by the Newcastle disease virus (NDV) highlight the importance of the trials for the improvement and development of vaccines and vaccination programs. Aim: In the present study, we evaluated the effectiveness of two vaccination schemes for protection against the velogenic NDV (vNDV) challenge. Methods: Four groups (A–D) of commercial broiler chickens were used. Two groups (G–A and G–B) were vaccinated with priming live HB1 GII simultaneously with inactivated GVII vaccines at 5 days of age, then boosted with live LaSota GII vaccine in group A and live recombinant NDV GVII vaccine in group B on day 16. Groups A to C were challenged with NDV/Chicken/Egypt/ALEX/ZU-NM99/2019 strain (106 Embryo infective dose 50/0.1 ml) at 28 days of age. Results: Two vaccination schemes achieved 93.3% clinical protection against NDV with body gain enhancement; whereas, 80% of the unvaccinated-challenged birds died. On day 28, the mean HI antibody titers were 4.3 ± 0.33 and 5.3 ± 0.33 log2 in groups A and B, respectively. As well as both programs remarkably reduced virus shedding. The two vaccination schemes displayed close protection efficacy against the vNDV challenge. Conclusion: Therefore, using the combination of a live attenuated vaccine with an inactivated genetically matched strain vaccine and then boosting it with one of the available live vaccines could be considered one of the most effective programs against current field vNDV infection in Egypt.
Author Related Publications
Nora Mohamed Abdelaziz Sadawy, "التكيس البطنى للطور المتحوصل من الديدان الشريطية في الأغنام: الآفة التشريحية و الصورة المجهرية مع التمييز الطفيلي. تقرير حالة.", لايوجد, 1900
More
Nora Mohamed Abdelaziz Sadawy, "Clinical and histopathological studies on neurodegeneration and dysautonomia in buffalo calves during foot-and-mouth disease outbreaks in Egypt", Veterinary World, 2021
More
Nora Mohamed Abdelaziz Sadawy, "Saussurea lappa Ethanolic Extract Attenuates Triamcinolone Acetonide-Induced Pulmonary and Splenic Tissue Damage in Rats via Modulation of Oxidative Stress, Inflammation, and Apoptosis", MDPI, 2020
More
Nora Mohamed Abdelaziz Sadawy, "Clinical and histopathological studies on neurodegeneration and dysautonomia in buffalo calves during foot-and-mouth disease outbreaks in Egypt", Veterinary World, 2021
More
Nora Mohamed Abdelaziz Sadawy, "Clinical and histopathological studies on neurodegeneration and dysautonomia in buffalo calves during foot-and-mouth disease outbreaks in Egypt", Veterinary World, 2021
More
Department Related Publications
Mohammed Hamed Mohamed Mohamid, "Bacterial septicemia and enteritis in young African Ostrich (Struthio camelus) in Egypt. Zag. ", لايوجد, 1900
More
Abdelmoneim Ahmed Ali Muhmmed, "Studies on tumors in ducks in sharkia province", Zagazig Vet. J. Vol. 22. No. 3, 1994
More
Alsayed Rashad Abdelmegeed , "التاثير المتبادل بين السيستيسركوزس والفاشيوليازس فى الارانب", لايوجد, 1900
More
Alsayed Rashad Abdelmegeed , "التاثير المتبادل بين البلهارسيا والسسستيسركس فاشيولارز فى الجرزان البيضاء", لايوجد, 1900
More
Alsayed Rashad Abdelmegeed , "دراسات تجريبية مرضية عن دور خلايا الازنوفيل فى تشمع الكبد الناتج عن البلهارسيا", لايوجد, 1900
More
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف