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OJVRTM
Online
Journal of Veterinary Research©
Volume 26 (8): 593-598, 2022.
Seroprevalence of Newcastle disease antibodies
in vaccinated broilers and layers.
Ali
Mahdi Sahib1, Khaleel Z Al-Alo2,
Hayder R Abed3, Kaveh
Veisi4
1, 3Department of Public Health,
2Clinical Sciences, College of Veterinary Medicine, University of Kufa, Iraq
4Faculty of Veterinary Medicine,
University of Tehran, Iran
ABSTRACT
Sahib AM, Al-Alo KZ, Hayder RA, Veisi K, Seroprevalence of
Newcastle disease antibodies in vaccinated broiler and layers, Onl J Vet Res, 26 (8):
593-598, 2022. We
report effect of vaccination on Newcastle virus antibody titers under field conditions
in 55 broilers and layers. Birds were vaccinated alpha-herpesvirus, Massachusetts with or without
Lasota, Lukert and pox, subcutaneously,
intramuscular, by spray or drinking water at 1 to 119 days of age. Wing vein
blood was aspirated at 30 days in broilers and 140 days for serum Newcastle virus
antibody detected by ELISA assay. We found 71% prevalence in broilers and 91% in
layers with no significant difference between them. However mean antibody titers
in layers were 33890.3 ± 930.3 but in broilers only 1407.6 ± 31.7, a 24 fold
difference (P < 0.01). Maximum titers in broiler were 1736 and in layers
43218 (P < 0.05). Results suggest that age and repeat vaccinations in layers
account for much higher titer response to Newcastle virus.
Key words: Newcastle disease,
Vaccination, antibody titer, ELISA test, chickens.
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