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OJVR
Online Journal of Veterinary Research©
Volume 21
(12):798-801, 2017.
Effect of influenza vaccination
and age on immune response in broiler chickens.
Hessamoddin Zahabi, Zahra Boroomand*
Faculty
of Veterinary Medicine, Shahid Chamran
University of Ahvaz, Ahvaz, Iran. Corresponding author: z.boroomand@scu.ac.ir
Zahabi H, Boroomand Z., Effect of influenza and newcastle
vaccinations and age on immune response in broiler chickens., Onl J Vet Res., 21
(12):798-801, 2017. In
poultry, low pathogenic H9N2 influenza virus reduces production and increases
mortality and vaccination costs in poultry. Effect of bivalent, influenza H9N2
and Newcastle killed vaccines on humoral immune response in groups of 15000
broiler chicks of different ages are described. Groups were housed in 3 separate halls
but bred under the same conditions. Chicks were then vaccinated bivalent
inactivated vaccine against influenza and Newcastle disease at 1 day of age in
Hall 1, 3 days in Hall 2 and 7 days of age in Hall 3. Blood was taken
from 24 chicks from each group on
the 1st and 7th day of week for hemaglutination
tests. Results showed that vaccination on 1st and 3rd
day of age not only did not increase production, but also reduced antibody
titer at 35 and 42 days of age compared with those vaccinated at 7 days.
Key words: avian
influenza, vaccination program, antibody titer.
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