Difference in in vitro fermentability of four carbohydrates and two diets, using ileal and faecal inocula from unweaned piglets

Awati, Ajay, Bosch, Marlou W., Tagliapietra, Franco, Williams, Barbara A. and Verstegen, Martin W. A. (2006) Difference in in vitro fermentability of four carbohydrates and two diets, using ileal and faecal inocula from unweaned piglets. Journal of the science of food and agriculture, 86 4: 573-582. doi:10.1002/jsfa.2387

Author Awati, Ajay
Bosch, Marlou W.
Tagliapietra, Franco
Williams, Barbara A.
Verstegen, Martin W. A.
Title Difference in in vitro fermentability of four carbohydrates and two diets, using ileal and faecal inocula from unweaned piglets
Journal name Journal of the science of food and agriculture   Check publisher's open access policy
ISSN 1097-0010
Publication date 2006-03-01
Sub-type Article (original research)
DOI 10.1002/jsfa.2387
Open Access Status Not yet assessed
Volume 86
Issue 4
Start page 573
End page 582
Total pages 10
Place of publication Chichester, England
Publisher John Wiley & Sons on behalf of SCI.
Language eng
Subject 070204 Animal Nutrition
Abstract An experiment was conducted to examine differences in the in vitro fermentability of four carbohydrate-rich feed ingredients and two weaning piglet diets with and without these ingredients, using both the ileal contents and the faeces of unweaned piglets as inocula. In the first part of the experiment, cumulative gas production was measured over time, using faecal inocula mixed from nine specially raised crossbred piglets (no creep feed or antibiotics) at 3 weeks of age. Inulin, lactulose, unmolassed sugar beet pulp, wheat starch and the two diets were used as substrates and fermented in vitro for 72 h. Gas production was measured as an indicator of the kinetics of fermentation. Fermentation end-products, including volatile fatty acids and ammonia, and organic matter loss, were also measured. For the fermentations of feed ingredients, samples were also collected for polymerase chain reaction/denaturing gradient gel electrophoresis analyses initially and after the fermentation process, to study changes in the composition of the bacterial community. This procedure was repeated 1 week later, using ileal contents from the same piglets as inoculum. There were significant differences between the inocula, in terms of both overall fermentation characteristics and composition and between the substrates. There was also a significant interaction between inocula and substrates, which suggests that there were potentially important differences in the microbial activity occurring in these two areas of the gastrointestinal tract (GIT). For the two diets, one with and one without addition of these fermentable ingredients, there were significant differences in terms of the kinetics, but less so in terms of the end-products of fermentation. It was concluded that inocula from both the small and large intestine should be used to obtain a more accurate assessment of potential feed ingredients which will stimulate fermentation in the piglet GIT. Copyright © 2005 Society of Chemical Industry
Keyword cumulative gas production
fermentable carbohydrate
in vitro fermentation
microbial activity
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Centre for Nutrition and Food Sciences Publications
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