期刊
ANAEROBE
卷 18, 期 1, 页码 67-75出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.anaerobe.2011.12.007
关键词
Intestine; Microbiota; Mice; Bacitracin; Enrofloxacin; Neomycin sulfate
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Advanced Foods and Materials Network (AFMNet)
The influence of three antibiotics (bacitracin, enrofloxacin, and neomycin sulfate) on the mucos-aassociated enteric microbiota and the intestines of mice was examined. Antibiotics caused conspicuous enlargement of ceca and an increase in overall length of the intestine. However, there were no pathologic changes associated with increased cecal size or length of the intestine. Conspicuous reductions in the richness of mucosa-associated bacteria and changes to community profiles within the small (duodenum, proximal jejunum, middle jejunum, distal jejunum, and ileum) and large (cecum, ascending colon, and descending colon) intestine occurred in mice administered antibiotics. Communities in antibiotic-treated mice were dominated by a limited number of Clostridium-like (i.e. clostridial cluster XlVa) and Bacteroides species. The richness of mucosa-associated communities within the small and large intestine increased during the 14-day recovery period. However, community profiles within the large intestine did not return to baseline (i.e. relative to the control). Although antibiotic administration greatly reduced bacterial richness, densities of mucosa-associated bacteria were not reduced correspondingly. These data showed that the antibiotics, bacitracin, enrofloxacin, and neomycin sulfate, administered for 21 days to mice did not sterilize the intestine, but did impart a tremendous and prolonged impact on mucosa-associated bacterial communities throughout the small and large intestine. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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