Effect of the addition of Peptostreptococcus productus ATCC35244 on the gastro-intestinal microbiota and its activity, as simulated in an in vitro simulator of the human gastro-intestinal tract (original) (raw)
Abstract
Peptostreptococcus productus ATCC35244, a reductive acetogenic strain, was added daily over 9 successive days to the fourth vessel (ascending colon) of the SHIME, a six-stage reactor system simulating the in vivo continuous culture conditions of the human gastro-intestinal tract. Final numbers of organisms (cfu)/ml reactor contents (c) were attained such that log10 c = 6.9 ± 0.1. The addition caused the CH4 production to decrease below the detection limit while total gas and CO2 production in the fifth (transverse colon) and sixth reactor (descending colon) were lowered and the acetic acid concentration was augmented. Ending the supplementation caused CH4 production to re-establish within 4 days, while CO2 production increased much more slowly. The concentration of acetic acid only started to decrease after 7 days. The results indicate that P. productus, upon regular administration, is able to compete with methanogens for H2 in the gastro-intestinal microbial ecosystem because of its reductive acetogenic character.
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Authors and Affiliations
- Laboratory of Microbial Ecology, Faculty of Agricultural and Applied Biological Sciences, University of Gent, Coupure Links 653, B-9000 Gent, Belgium Tel.: 0032/264 59 76 Fax: 0032/264 62 48 e-mail: Willy.Verstraete@rug.ac.be, , , , , , BE
L. Nollet, I. Vande Velde & W. Verstraete
Authors
- L. Nollet
- I. Vande Velde
- W. Verstraete
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Received: 11 December 1996 / Received revision: 26 February 1997 / Accepted: 1 March 1997
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Nollet, L., Velde, I. & Verstraete, W. Effect of the addition of Peptostreptococcus productus ATCC35244 on the gastro-intestinal microbiota and its activity, as simulated in an in vitro simulator of the human gastro-intestinal tract.Appl Microbiol Biotechnol 48, 99–104 (1997). https://doi.org/10.1007/s002530051022
- Issue date: July 1997
- DOI: https://doi.org/10.1007/s002530051022