Detection of MDA titer of ınfectious bronchitis virus and comparison of antibody titer produced by two different ınfectious bronchitis vaccine

Authors : Mirza Mienur MEHER, Mosharof HOSSAIN, Golam HAIDER
Pages : 44-51
Doi:10.34233/jpr.1205656
View : 32 | Download : 7
Publication Date : 2022-12-30
Article Type : Research Paper
Abstract :The infectious bronchitis insert ignore into journalissuearticles values(IB); is divesting infectious diseases of poultry. Hence, this study determined the maternally derived antibody insert ignore into journalissuearticles values(MDA); titer of IBV and comparison of two IB vaccine in layer. A total of 1600 birds were equally allocated into two groups insert ignore into journalissuearticles values(group-A and group-B);. The group-A and group-B were vaccinated by two different vaccines having the strain “B1-Strain of ND+Massachusetts B-41 Strains of IBV” and “Hitchner-B1 Strain of ND+Massachusetts H120 Strains of IBV” respectively. Blood samples were collected and antibody titer was detected by indirect ELISA test. Results showed that both groups had the protective level of MDA titer and both the vaccines significantly insert ignore into journalissuearticles values(p<0.01); increased the antibody mean titer than the MDA. Between the groups, the highest antibody mean titer insert ignore into journalissuearticles values(11544.43±177.51); was observed in group-B at 5 weeks age and had significant insert ignore into journalissuearticles values(p<0.01); difference with group-A insert ignore into journalissuearticles values(10222.11±96.96);. The effect size of the antibody titer was higher in group-B insert ignore into journalissuearticles values(14.25; CI: 9173.82-9564.39; n=46 at 5 weeks birds); than group-A insert ignore into journalissuearticles values(9.54; CI: 8580.19-9131.68; n=46 at one-day-old birds); respectively. Shortly, the MDA mean titer was in protective condition and both the IB vaccinated groups had the significantly insert ignore into journalissuearticles values(p<0.05); higher antibody mean titer than the protective level of antibody titer insert ignore into journalissuearticles values(>853);.
Keywords : Antibody Titer, Indirect ELISA

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