Home Articles List Article Information
Zagazig Veterinary Journal
Journal Archive
Volume Volume 49 (2021)
Volume Volume 48 (2020)
Volume Volume 47 (2019)
Volume Volume 46 (2018)
Volume Volume 45 (2017)
Volume Volume 44 (2016)
Volume Volume 43 (2015)
Volume Volume 42 (2014)
Volume Volume 41 (2013)
Habaka, M., Aly, M., Lebdah, M., Abo-Elazm, K. (2020). Newcastle disease virus Genotype VII in Chicken Flocks in Dakahlia Governorate and the Effectiveness of some Vaccines. Zagazig Veterinary Journal, 48(4), 448-456. doi: 10.21608/zvjz.2020.49280.1123
Manal Habaka; Mona Aly; Mohamed Lebdah; Kamel Abo-Elazm. "Newcastle disease virus Genotype VII in Chicken Flocks in Dakahlia Governorate and the Effectiveness of some Vaccines". Zagazig Veterinary Journal, 48, 4, 2020, 448-456. doi: 10.21608/zvjz.2020.49280.1123
Habaka, M., Aly, M., Lebdah, M., Abo-Elazm, K. (2020). 'Newcastle disease virus Genotype VII in Chicken Flocks in Dakahlia Governorate and the Effectiveness of some Vaccines', Zagazig Veterinary Journal, 48(4), pp. 448-456. doi: 10.21608/zvjz.2020.49280.1123
Habaka, M., Aly, M., Lebdah, M., Abo-Elazm, K. Newcastle disease virus Genotype VII in Chicken Flocks in Dakahlia Governorate and the Effectiveness of some Vaccines. Zagazig Veterinary Journal, 2020; 48(4): 448-456. doi: 10.21608/zvjz.2020.49280.1123

Newcastle disease virus Genotype VII in Chicken Flocks in Dakahlia Governorate and the Effectiveness of some Vaccines

Article 9, Volume 48, Issue 4, Autumn 2020, Page 448-456  XML PDF (332.83 K)
Document Type: Original Article
DOI: 10.21608/zvjz.2020.49280.1123
Authors
Manal Habaka email 1; Mona Aly1; Mohamed Lebdah2; Kamel Abo-Elazm3
1Animal Health Research Institute
2Avian and Rabbit Medicine Department, Faculty of Veterinary Medicine- Zagazig University
3Poultry and Rabbit Diseases Department, Faculty of Veterinary Medicine, Mansura University
Abstract
Out of fifteen chicken flocks, ten were tested Newcastle Disease Virus (NDV) positive by RT-PCR. Two selected NDV isolates from previously vaccinated flocks were selected for further investigation. The isolates were proofed negative for the presence of either infectious bronchitis virus (IBV) or avian influenza virus (AIV) genome. The mean death time and intracerebral pathogenicity indices as well as the presence of 112RRQKRF117  motif at the F gene cleavage site were indicative for the virulence of the investigated strains. The phylogenetic analysis showed that the velogenic genotype isolate clustered with published class II genotype VII and closely related to Middle East isolates. In vivo protection assay revealed that vaccination with live and/or inactivated ND vaccines induced sufficient protection ranged between 86.7 % and 100 % against morbidity and mortality as judged by HI titers and challenge test with NDV genotype VII.
Keywords
Newcastle Disease Virus; Newcastle Disease Vaccine Efficacy; Newcastle Disease Virus Genotype VII
Main Subjects
Clinical Science, Surgery and Veterinary Diseases (Pathology, Clinical Pathology, Internal Medicine, Infectious Diseases, Poultry Diseases, Fish Diseases and Management, Surgery, Theriogenology)
Statistics
Article View: 58
PDF Download: 100