Comparative study of antibody titers obtained from Avinew and La Sota vaccines in broiler chicks with ELISA test

Newcastle disease is an important viral disease and its occurrence and virulence in Iran has increased in recent years. Therefore control of this disease through effective vaccination programs is very important. The objective of this study was to compare the effectiveness of La Sota and Avinew vaccines in broiler chicks. In this study, 270 day old Ross broiler chicks were divided into 3 groups with 3 replicates in each group and 30 chicks in each replicate. Avinew and lasota vaccines were used in groups 1 and 2 respectively. Group 3 was the covered group and Newcastle vaccine wasnt used in this group. Breeding conditions were the same in the 3 groups and blood samples were collected the 3 groups and blood samples were collectd on days 1,14,24,34 and 44 for determination of antibody titers obtained from Newcastle vaccines using the ELISA serologic test. The results indicated that in the vaccinated groups, antibody titers increased significantly (v