Figure 2.

Increments, with respect to time zero, in the concentration of acetate on the bacterial cultures when grown in mono-culture (Bifidobacterium blue-bars and C. difficile red-bars) or in co-culture (stripped bars) in the prebiotics Synergy (Syn), Inulin (Inu), and Actilight (Act), in glucose (Glc) or without any carbon source added (WCS). Different letters above columns denote statistically significant differences (p < 0.05) among carbon sources in the corresponding bacterial cultures, either mono-cultures (capital letter; red color for bifidobacteria and blue color for C. difficile) or co-cultures (lowercase letters). ^*Indicates statistically significant differences (p < 0.05) for the corresponding bacterial strain between mono- and co-culture.