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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2005;18(1): 85-89.
https://doi.org/10.5713/ajas.2005.85    Published online April 19, 2005.
Effects of Green Tea Polyphenols and Fructo-oligosaccharides in Semi-purified Diets on Broilers` Performance and Caecal Microflora and Their Metabolites
B. H. Cao, Y. Karasawa, Y. M. Guo
This study was conducted to examine the effects of green tea polyphenols (GTP) and fructo-oligosaccharides (FOS) supplement on performance, counts of caecal microflora and its metabolites production. In female broiler chickens fed on semi-purified diets from 28 to 42 d of age, dietary green tea polyphenols (GTP) and fructo-oligosaccharides (FOS) significantly reduced mortality (p<0.05). Dietary GTP significantly decreased the total count of caecal microflora, each colonic population count and caecal flora metabolites contents when compared to other groups (p<0.05). Dietary FOS did not influence the total count of caecal flora but it selectively increased Bifidobacteri and Eubacteria counts (p<0.05) and decreased the count of other microflora and concentrations of caecal phenols and indole (p<0.0.5). These results suggest that GTP and FOS in semi-purified diets can decrease mortality and change the caecal colonic flora population, but GTP shows antibiotic-like effects of non-selectively decreasing all colonic flora and then metabolites, and FOS acts selectively by increasing profitable microflora and decreasing production of caecal microflora metabolites besides volatile fatty acids.
Keywords: Broilers; Green Tea Polyphenols; Fructo-oligosaccharides; Performance; Caecal Microflora Count; Caecal Microflora Metabolites

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