[RESULTS] At the end of the intervention , there were no significant differences in the concentrations of bifidobacteria between the groups , after adjusting for baseline values ( oligofructose/inulin 6.9 +1.4 , placebo 7.8 +1.3 log10cells/g dry faeces , P > 0.05 ) , but there were significantly lower concentrations of Faecalibacterium prausnitzii ( 7.0 +1.0 vs. 8.4 +1.3 log10cells/g , P = 0.01 ) and Bacteroides-Prevotella ( 9.1 +1.0 vs. 9.9 +0.9 log10cells/g , P = 0.05 ) in patients receiving additional oligofructose/inulin .