Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 61519
Title Degradation of guar gum by intestinal bacteria
Author(s) Hartemink, R.; Schoustra, S.E.; Rombouts, F.M.
Source Bioscience and Microflora 18 (1999)1. - ISSN 1342-1441 - p. 17 - 25.
Department(s) Food Chemistry and Microbiology
Laboratory of Genetics
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract Guar gum is widely used in the food industry as a thickening agent. Guar and other galactomannans are ingested as a normal part of the human diet. Guar is completely degraded in the large intestine. Often large amounts of gas are produced. The objective of the study was to determine which species are responsible for the degradation of guar in the GI tract. It was observed that only a limited number of species is able to degrade and ferment guar. Guar degrading strains could be isolated from faecal samples of all volunteers and in 90% of the saliva of volunteers. The main species isolated from humans were Bifidobacterium dentium and Clostridium butyricum. From several samples of animal faeces Streptococcus bovis could be isolated. In addition some strains of Bacteroides ovatus were able to degrade guar to a limited extent. Fermentation resulted in the production of short-chain fatty acids and, when Cl. butyricum was present, in a large gas production. Competition experiments showed that Cl. butyricum degrades guar faster than both other species under simulated physiological conditions. It was concluded that Cl. butyricum is the main guar degrading species and the causative agent of the gas formation after guar intake.
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