Document Detail

Effects of yeast culture in broiler diets on performance and immunomodulatory functions.
MedLine Citation:
PMID:  18577619     Owner:  NLM     Status:  MEDLINE    
A study was conducted to evaluate the effect of supplemental yeast culture (Diamond V XP Yeast Culture; YC) in broiler diets on performance, digestibility, mucosal development, and immunomodulatory functions. One-day-old Arbor Acres chicks (n = 960) were randomly assigned to 1 of 4 dietary treatments based on corn and soybean meal and containing 0, 2.5, 5.0, and 7.5 g/kg of YC in the diet for 42 d. Each treatment consisted of 12 replicates of 20 broilers each. Nutrient digestibility was determined on d 15 and 35 by total fecal collection. On d 21 and 42, 12 birds per treatment were sacrificed to evaluate gut morphology and secretory IgA. Broilers were vaccinated with Newcastle disease vaccine by eye drop on d 7 and 28 and antibody titer was determined on d 14, 21, 35, and 42. Dietary supplemental YC at 2.5 g/kg improved average daily gain and feed conversion during grower and overall periods (P <or= 0.05). Yeast culture supplementation increased digestibility of Ca (linear and quadratic, P = 0.01) and P (linear, P = 0.01) on d 35, but did not affect (P > 0.05) protein retention and energy digestibility. Villus height to crypt depth ratios in the duodenum and jejunum (d 42) and ileum (d 21) were increased (P <or= 0.05) in broilers fed 2.5 g/kg of YC. Yeast culture increased antibody titers to Newcastle disease virus (linear, P <or= 0.05), serum lysozyme activity (linear and cubic, P <or= 0.05), and IgM (linear, P <or= 0.05) and secretary IgA concentrations in the duodenum (linear, P = 0.01). Results of this study indicate that dietary supplemental YC at 2.5 g/kg improved growth performance. Dietary YC affected immune functions, digestibility of Ca and P, and intestinal mucosal morphology of broilers. Growth performance was optimized at 2.5 g/kg of YC in the present study. Immune function could be modified with dietary YC supplementation.
J Gao; H J Zhang; S H Yu; S G Wu; I Yoon; J Quigley; Y P Gao; G H Qi
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  87     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-25     Completed Date:  2008-10-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1377-84     Citation Subset:  IM    
Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.
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MeSH Terms
Animal Feed
Animal Nutritional Physiological Phenomena
Antibodies, Viral / blood
Chickens / growth & development*,  immunology*
Diet / veterinary*
Dietary Supplements
Digestion / physiology
Immunoglobulin A / blood
Immunoglobulin A, Secretory / blood
Immunoglobulin G / blood
Immunoglobulin M / blood
Intestines / anatomy & histology,  physiology
Muramidase / metabolism
Newcastle disease virus / immunology
Weight Gain / drug effects
Yeast, Dried / pharmacology*
Reg. No./Substance:
0/Antibodies, Viral; 0/Immunoglobulin A; 0/Immunoglobulin A, Secretory; 0/Immunoglobulin G; 0/Immunoglobulin M; EC

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