Document Detail

Intestinal bacterial community and growth performance of chickens fed diets containing antibiotics.
MedLine Citation:
PMID:  16615359     Owner:  NLM     Status:  MEDLINE    
This study was conducted to relate the performance of broiler chickens fed diets containing growth-promoting antibiotics to changes in the intestinal microbiota. The technique of denaturing gradient gel electrophoresis (DGGE) of amplicons of the region V3 of 16S rDNA was used to characterize the microbiota. Two experiments were conducted, one with broilers raised in battery cages and the other with broilers raised in floor pens. Antibiotics improved the performance of the chickens raised in floor pens only. Avilamycin, bacitracin methylene disalicylate, and enramycin induced changes in the composition of the intestinal bacterial community of the birds in both experiments. The number of bacterial genotypes found in the intestinal tract of chickens was not reduced by the antibiotics supplemented in either environment. However, the changes in the composition of the intestinal bacterial community induced by antibiotics may be related to improvement in growth performance. This was indicated by the suppression of 6 amplicons and the presence of 4 amplicons exclusive to the treatment that had the best performance in the floor pen experiment.
A A Pedroso; J F M Menten; M R Lambais; A M C Racanicci; F A Longo; J O B Sorbara
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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:  85     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-17     Completed Date:  2006-05-31     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  747-52     Citation Subset:  IM    
Department of Animal Science, College of Agriculture, University of São Paulo, 13418-900, Piracicaba, SP, Brazil.
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MeSH Terms
Animal Feed / analysis
Anti-Bacterial Agents / administration & dosage*,  analysis,  pharmacology*
Bacteria / genetics,  isolation & purification
Chickens / growth & development*,  microbiology*
DNA, Bacterial / genetics
Genetic Variation
Intestines / drug effects*,  microbiology*
RNA, Ribosomal, 16S / genetics
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/DNA, Bacterial; 0/RNA, Ribosomal, 16S

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