Assessment of yeast cell wall as replacements for antibiotic growth promoters in broiler diets: effects on performance, intestinal histo‐morphology and humoral immune responses

The study compared the effects of an antibiotic growth promoter (AGP), yeast (Saccharomyces cerevisiae) and yeast cell wall (YCW) on performance, microbiology and histo‐morphology of the small intestine and humoral immune responses in Ross 308 broilers. The treatments (eight replicates/treatment, n ...

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Bibliographic Details
Published in:Journal of animal physiology and animal nutrition 2012-04, Vol.96 (2), p.275-284
Main Authors: Ghosh, T. K, Haldar, S, Bedford, M. R, Muthusami, N, Samanta, I
Format: Article
Language:English
Subjects:
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
Anti-Bacterial Agents - pharmacology
antibiotic growth promoters
Antibiotics
Antibodies, Viral - blood
Bacitracin
body weight
Bone mineral density
broiler chickens
Cell Wall - chemistry
Cell walls
Chickens - blood
Chickens - growth & development
Chickens - immunology
diet
Diet - veterinary
Dietary Supplements
Diets
Duodenum
Escherichia coli
feed conversion
growth promotion
humoral immunity
Immune response (humoral)
immunity
Immunity, Humoral
intestinal histology
Intestines - anatomy & histology
Intestines - drug effects
Mucosa
Newcastle disease
Newcastle Disease - immunology
Newcastle Disease - prevention & control
Poultry
Promoters
Saccharomyces cerevisiae
Salmonella
Salmonella enterica subsp. enterica serovar Pullorum
Salmonella pullorum
Small intestine
villi
Viral Vaccines - immunology
yeast
yeast cell wall
Yeasts
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Summary:The study compared the effects of an antibiotic growth promoter (AGP), yeast (Saccharomyces cerevisiae) and yeast cell wall (YCW) on performance, microbiology and histo‐morphology of the small intestine and humoral immune responses in Ross 308 broilers. The treatments (eight replicates/treatment, n = 12/replicate) were negative control (NC, without AGP), positive control (PC, supplemented with bacitracin methylene disalicylate, 400 mg/kg), Y and YCW (supplemented with yeast and YCW, respectively, 1000 mg/kg). Live weight at 42 days improved (p = 0.086) in the PC, Y and YCW groups. Feed conversion ratio was better (p = 0.039) in the YCW group compared with the other groups. Antibiotic growth promoter in the PC group shortened the villi in duodenum (p = 0.044). Mucosal Escherichia coli number was higher in the PC group (p 
ISSN:0931-2439
1439-0396
DOI:10.1111/j.1439-0396.2011.01155.x