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Effects of inulin and di-D-fructose dianhydride-enriched

AuthorsPeinado, M.J.; Echávarri, A.; Ruiz, R.; Suárez-Pereira, E.; Ortiz-Mellet, Carmen; García Fernández, José Manuel ; Rubio, L.A.
di-D-fructose dianhydrides
Issue Date2013
AbstractIn vitro and in vivo experiments were designed to evaluate the effectiveness of laboratory made di-D-fructose dianhydride (DFA)-enriched caramels. The DFA-enriched caramels were obtained from D-fructose (FC), D-fructose and sucrose (FSC), or D-fructose and β-cyclodextrin (FCDC). In the in vitro experiment, raftilose and all caramels increased (P<0.05) L-lactate concentration and decreased (P<0.05) pH. Total SCFA concentration was higher (P<0.05) than controls in tubes containing raftilose, FSC, FCDC and CSC. Raftilose, and all caramels tested except FSC and FC (1%), increased (P<0.01) lactobacilli log10 number of copies compared with the non-additive control. FSC, FCDC and CSC increased (P<0.01) bifidobacteria number of copies respect to controls. All additives except FCDC decreased (P<0.01) Clostridium coccoides / Eubacterium rectale log number of copies. Compared with controls, raftilose, FC and CSC led to lower (P<0.01) Escherichia-Shigella and enterobacteria. For the in vivo experiment, a total of 144 male one-day-old broiler chickens of the Cobb strain were randomly assigned to 1 of 3 dietary treatments for 21 d. Dietary treatments were control (commercial diet with no additive), Inulin (20 g inulin / kg diet) and FC (20 g FC / kg diet). Final body weight of birds fed FC diet was higher (P<0.01) than controls or inulin fed birds, while feed: gain values were not different. Feed intake of chickens fed FC was higher (P<0.01) than that of inulin-fed birds, but not statistically different from controls. Crop pH values were lower (P<0.01) than controls in birds fed FC diet, with inulin fed chickens showing values not different from controls or FC fed birds. Lower (P<0.05) lactobacilli number of copies was determined in crop, ileum and caeca of birds fed the inulin diet compared with controls. Inulin supplementation also resulted in lower (P<0.05) C. coccoides / E. rectale, bacteroides and total bacteria in caecal contents. Addition of FC to broiler diets gave place to lower (P<0.05) enterobacteria and Escherichia-Shigella in crop and caecal contents compared with controls. Bacteroides number of copies increased (P<0.05) respect to controls in ileum, but decreased (P<0.05) in caeca of chickens fed the FC diet. Energy, ADF, NDF and non-starch polysaccharides (NSP) faecal digestibilities were greater (P<0.05) than controls in chickens fed on diets containing inulin or FC. Fat digestibility was higher (P<0.05) in FC fed birds compared with controls or inulin fed chickens. In conclusion, DFA-enriched caramels here tested, particularly FC, may represent a type of new additives useful in poultry production.
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