RT - Journal Article T1 - Effect of the Commercial Mixed Live Newcastle Disease and Infectious Bronchitis Vaccines and the Use of Two Separate Vaccines Given Simultaneously on Systemic Antibody Responses JF - virusj YR - 2013 JO - virusj VO - 7 IS - 3 UR - http://journal.isv.org.ir/article-1-132-en.html SP - 17 EP - 21 K1 - Immune response K1 - Newcastle Disease K1 - Infectious Bronchitis K1 - Commercial mixed live vaccines (IBV+NDV) K1 - Broiler chicks AB - Background and Aims: The objective of this study was to investigate the effects of Newcastle Disease and Infectious Bronchitis vaccination programs in chickens. Materials and Methods and Results: In the present study, 225 day-old broiler chicks divided into 5 groups. The groups were submitted to vaccinations, except for the non-vaccinated control group. The chickens in the groups 1 were kept as a control group and did not receive vaccine. The chickens in the group 2 were vaccinated with commercial mixed vaccine. The chickens in the groups 3 were vaccinated with two separate vaccines simultaneously. The chickens in the group 4 were vaccinated with single ND vaccine. The chickens in the groups 5 were vaccinated with single IB vaccine. Sera were collected at 18 and 45 days of age and submitted to serologic tests to assess antibody levels. Conclusion: Results demonstrate that there is not any significant statistical difference between the vaccinated groups. LA eng UL http://journal.isv.org.ir/article-1-132-en.html M3 10.21859/isv.7.3.17 ER -