THE MODULATION OF PERFORMANCE, CHOLESTEROL CONTENT AND IMMUNE RESPONSE INDUCED BY SACCHAROMYCES CEREVISIAE IN LAYING HENS | ||
| Egyptian Journal of Nutrition and Feeds | ||
| Article 24, Volume 18, Issue 1, April 2015, Pages 101-111 PDF (723.42 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejnf.2015.104791 | ||
| Authors | ||
| A. O. Abbas1; A. M.H. Ahmed2 | ||
| 1Animal Production Department, Faculty of Agriculture, Cairo University, Egypt. | ||
| 2Poultry Production Department, Faculty of Agriculture Ain Shams University, Egypt. | ||
| Abstract | ||
| This study was conducted to evaluate the effect of Saccharomyces cerevisiae supplementation of a commercial layer diet on the laying performance, blood lipid profile, liver and yolk cholesterol content, and immune response during 8-week period. A total of 180 Hy-line Brown laying hens of 40 wk of age were allocated to 4 dietary treatments, where every 45 hens were divided into three replicates. The basal diet was supplemented with Saccharomyces cerevisiae at the levels of 0.0, 0.2, 0.4, and 0.6%. Results showed that the highest egg number and egg weight were observed with 0.6% Saccharomyces cerevisiae supplement. Supplementing diets with Saccharomyces cerevisiae at all levels (0.2, 0.4, and 0.6%) significantly (P˂0.05) increased egg mass, antibody production, cell-mediated immune response, and reduced feed consumption, plasma cholesterol, LDL-cholesterol levels and liver cholesterol concentration. Furthermore, hens fed diets supplemented with 0.4 and 0.6% Saccharomyces cerevisiae showed significant enhancement of feed conversion ratio, an increase of plasma HDL-cholesterol and a reduction of both yolk cholesterol concentration and Heterophil:lymphocyte (H/L) ratio. In conclusion, Saccharomyces cerevisiae could be used to enhance production performance and immune response, and control cholesterol content of plasma, yolk and liver. | ||
| Keywords | ||
| laying hens; Saccharomyces cerevisiae; production performance; cholesterol; humoral trsponse; cell-mediated response | ||
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