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http://dx.doi.org/10.5187/JAST.2002.44.3.289

Effects of Supplementary Yeast Culture(Saccharomyces cerevisiae, Pichia pastoris) on the Performance Small Intestinal Microflora and Serum IgG Concentration in Broiler Chickens  

Park, D.Y. (Department of Animal Science and Technology, College of Industrial Science)
NamKung, H. (Department of Animal Science and Technology, College of Industrial Science)
Baek, I.K. (Department of Animal Science and Technology, College of Industrial Science)
Publication Information
Journal of Animal Science and Technology / v.44, no.3, 2002 , pp. 289-296 More about this Journal
Abstract
A broiler experiment was conducted to investigate the effect of supplementing yeast culture (Saccharomyces cerevisiae, Pichia pastoris) on the growth performance, small intestinal microflora and immune response in broiler chickens. One thousand hatched broiler chickens(Ross$^{(R)}$) were assigned to 6 treatments: control (basal diet), CTC; chlorotetracycline 100ppm, YC-SC; yeast culture(Saccharomyces cerevisiae) 0.3%, YC-PP; yeast culture(Pichia pastoris) 0.3%, RPPC-0.1; refined Pichia pastoris culture 0.1%, RPPC-0.3; refined Pichia pastoris culture 0.3%. There were no significant differences in growth, feed intake, feed efficiency and mortality among the treatments. However, chickens fed diets with yeast cultures showed numerically higher weight gain than those fed the control diets. Supplementation of yeast cultures and CTC improved feed efficiency and decreased mortality compared to control. Nutrient digestibilities were not affected by the dietary treatments. Total number of Lactobacilli in small intestine was higher while that of Cl. perfringens was lower with yeast culture treatments than control. Small intestine E. coli population of RPPC-0.3 treatment was significantly lower than that of the control. The serum IgG concentration tended to be higher in broilers fed yeast cultures than those fed the control and CTC diet. In conclusion, the supplementation of yeast culture products showed, although not significant but, numerical advantages in productivity and profile of microbial flora and serum IgG compared to the control and CTC supplementation.
Keywords
Yeast culture; S. cerevisiae; Pichia pastoris; Performance; Small intestinal microorganism; serum IgG; Broiler;
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