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All Boards >> Irritable Bowel Syndrome Research Library

HeatherAdministrator

Reged: 12/09/02
Posts: 7677
Loc: Seattle, WA
Effect of fiber source on Clostridium difficile
      07/11/04 01:32 PM

Scand J Gastroenterol. 1994 Oct;29(10):916-22.

Effect of fiber source on short-chain fatty acid production and on the growth and toxin production by Clostridium difficile.

May T, Mackie RI, Fahey GC Jr, Cremin JC, Garleb KA.

Dept. of Animal Sciences, University of Illinois, Urbana.

BACKGROUND: Fermentable fiber promotes the growth of resident gut microbes, which modify the environment of the gastrointestinal tract and thus prevent colonization by Clostridium difficile. METHODS: An in vitro system with pigs as fecal inoculum donors was used to estimate fiber fermentability and changes in intestinal microbiota. RESULTS: Acetate and propionate production (mumol/mg substrate fermented/day) was greatest for gum arabic (1013.4 and 704.1, respectively); butyrate production was greatest for xylo-oligosaccharide (345.6). Growth of total anaerobes and clostridia was greatest for gum arabic (21.2 and 16.2 x 10(8) counts/ml, respectively) and xylo-oligosaccharides (21.0 and 19.6 x 10(8) respectively); growth of acidogenic bacteria was greatest with fructo-oligosaccharide (6.7 x 10(8) counts/ml). No culturable counts of C. difficile were obtained, nor was toxin A detected. CONCLUSIONS: Fermentable fibers support the growth of indigenous intestinal bacteria, particularly acidogenic bacteria, and yield large amounts of short-chain fatty acids with decreased gut pH. These factors contribute to the prevention of growth and toxin elaboration by C. difficile.

PMID: 7839098 [PubMed - indexed for MEDLINE]

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=7839098

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