عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In order to study the effect of Tsukamurella inchonensis bacterin on feed conversion ratio in broiler chickens, a total of 140 day-old broiler chicks were purchased and and 20 chicks were bled for determination maternal antibody and remaining chicks divided randomly into 4 equal groups and each group divided into 3 equal subgroups. Chickens of group A received 106 bacterin subcutaneously on 2 days before vaccination against influenza disease. Chickens of group B received 106 bacterin subcutaneously on 6 days after the first injection of bacterin. Chickens of group C received 106 bacterin subcutaneously on 6 days after the second injection of bacterin. Chickens of group D, vaccinated against influenza disease but did not receive bacterin. Mean feed intake, weight gains, and feed conversion ratio of all groups were determined at 21, and 42 days. The results of present study showed that there was not any significant difference between groups that received Tsukamurella inchonensis bacterin compared to control group. Comparison of chicks weight gains showed that there was significant difference between all groups during 21-42 days, and 0-42 days. Comparison of chicks feed intake showed that there was significant difference between all groups during 0-21 days, 21-42 days, and 0-42 days.