Journal
ARCHIVES OF ANIMAL NUTRITION
Volume 61, Issue 4, Pages 235-246Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17450390701431631
Keywords
inulin; intestinal microbiota; short chain fatty acids; pig
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We explored whether bifidobacteria and lactobacilli numbers and other selected bacteria in the upper intestine and the caecum of growing pigs were affected by diet and intake of inulin. Starting at two weeks after weaning ( 28 d) 72 pigs were fed two types of diets ( wheat/ barley ( WB) or maize/ gluten ( MG)), without or with 3% inulin ( WB + I, MG + I)) for three and six weeks. Intestinal bacteria were quantified by fluorescence- in- situ- hybridization ( n = 8/ group). Duration of feeding had no effect on the variables tested, so data for both periods were pooled. Gastric total bacteria amounted to log(10) 7.4/ g digesta. Bifidobacteria were detected in stomach and duodenum two weeks after weaning and disappeared thereafter. In jejunum and caecum bifidobacteria were present at a level of log(10) 7.0/ g digesta. Inulin did not alter numbers of lactobacilli, bifidobacteria, enterococci, enterobacteria and bacteria of the Clostridium coccoides/ Eubacterium rectale- group. Inulin disappearance in stomach plus jejunum was higher with the MG diet ( 73.7 vs. 60.7%, p = 0.013). Caecal acetate was lower in inulin- supplemented diets ( p < 0.05) whereas propionate and butyrate were higher in pigs fed the WB diets ( p < 0.05). With the WB diet total caecal short chain fatty acids concentration was higher which resulted in a lower pH value ( p < 0.05).
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