Effect of Isomaltooligosacchrides on Jejunum and Caecum Microflora Population in Broiler

A total of 600 one-day-old AA broilers were selected and randomly assigned to three groups to study the effect of isomaltooligosacchrides(IMO) on jejunum and caecum microflora. Each group consisted of four replications of 50 broilers.Three group were fed with diets as follows respectively:①basic diet +0.1%IMO;②basic diet +(3.3 mg/kg colistin sulfate+16.5 mg/kg zinc bacitracin);③basic diet as control. On day 21 and day 42 of the trail, two broilers of each replication were dissected to take the digesta of jejunum and caecum out and assay the population of E.coli, salmonella and lactoacillus. The results showed that E.coli population in the jejunum and caecum of IMO group was lower (P0.05) than that of control group,but lactoacillus population was significantly higher than that of the control group (P0.05).Little salmonella were measured in jejunum and caecum of IMO group.E. coli,salmonella and lactoacillus population in the jejunum and caecum of antibiotic group were lower than that of control group(P0.05).