the effects of biomin containing probiotics and prebiotics on performance of broiler chickens and immune response against newcastle vaccine

due to growing concerns about antibiotic resistance and the potential for a ban for antibiotic growth promoters, there is an increasing interest in finding alternatives to antibiotics in poultry production. therefore probiotic bacterial or fungal origin used as alternatives to antibiotic growth stimuli.to determine the effects of biomin (biomin contains of enterococcus faecium (a probiotic), fructo-oligosacharide(a peribiotic) and particles of immune stimulator, similar to cell wall particles) on immune response against newcastle vaccine and performance of ross 308 broiler chickens, 180 day-old broiler chicks were randomly allotted into three groups in four replicates. groups 2 and 3 received 0.1% and 0.2 % biomin respectively; group 1 did not receive any biomin in the diet. all groups received oil newcastle vaccine at 9 days old. other vaccination programs arranged based on local area. blood samples were collected 4 times and hi tests were performed on serum samples of chickens. the performance of different groups during the breeding period was evaluated. in 14 days after vaccination with oil newcastle vaccine between the group received 0.2 percent biomin and control group significant difference was observed. antibody titer against newcastle in groups received biomin in 19 and 29 days after vaccination were higher than control group. at 42 days of age, groups fed the diet containing biomin had body weight significantly higher than control group. results indicated that biomin effects on increasing oil newcastle vaccine induced immunity and improve body weight.