Babak Ghahramani, Reza Alipour, Khashayar Mehrani, Mansoor Mehrvarz and Shahrad Gerayili Moghaddam
The objective of this study was to investigate the serological differences of two different Newcastle Disease (ND) vaccination program in broiler breeder farms. Ninety broiler breeder chickens was selected and randomly distributed in three groups (each group with three repetitions). In two experimental group two different vaccination programs was used and group three was as a control group and the ND vaccine was not used. On days 1, 30, 110, and 145 blood samples were collected and examined with HI test. For Data analyzing One-way ANOVA statistical method was used for compare antibody titers against Newcastle disease and statistical software was PASW SPSS 18th edition. Results of HI test showed that mean of antibody titers was higher in the groups that ND vaccines was used, and also HI antibody titer in group that inactivated vaccines was used statistically different from the group that was not used (p<0.05). Because of economical losses causes by ND disease, it is necessary to applying exact vaccination programs in broiler breeder flocks and observes of biosecurity to decrease economical losses.
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