European Journal of Zoological Research
Abstract
Author(s): Amir Kazemian Maleki, Adel Feizi and Younes Anzabi
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<0.01). However, feed conversion rate, feed intake and final body weight in Biovac group was
better than the other groups, although this difference was not statistically significant. The amount of mortality in
Biovac group was lower than the other two groups. The results of the study showed that according to significant
difference from the aspect of the antibody titers produced by the La Sota vaccine, although the incidence of
reactions of resulting from the use of this vaccine using of it in high risk areas is unavoidable.
