Research Article
Amir Kazemian Maleki, Adel Fei
Abstract
Newcastle disease is a highly contagious and main disease of birds that affects many species of domestic and wild birds. The aim of this study was to compare the antibody titers produced by live vaccines of Newcastle disease (Biovac, Clone and La Sota) in broiler chickens with ELISA test. This study was conducted in a broiler farms that has three similar salons. Three vaccines Biovac, Clone and La Sota were administrated in drinking water on days 8, 22 and 36 in each of groups. At the end of the breeding period at slaughterhouse, 20 serum samples were obtained from each group chickens. Samples using the ELISA test from the aspect of antibody titers were evaluated. The amount of feed consumption, final weight, FCR and Mortality rates were also noted. The results of study showed that from the aspect of antibody titer there was highly significant difference between La Sota vaccine group and other two groups (p