. 2016 May 18;7:738. doi: 10.3389/fmicb.2016.00738

Table 1.

Normalized cell index (mean ± sd) obtained after 12 h of incubation of HT29 cells with the supernatants (5%) of the C. difficile mono-culture or C. difficile-Bifidobacterium co-cultures grown in different prebiotics, glucose or without any carbon source added (WCS).

Culture	Normalized cell index
	Carbon source
	Synergy	Inulin	Actilight	Glucose	WCS
C. difficile	−0.39±0.03^a,1	−0.30±0.03^a,2	−0.35±0.04^a,1	−0.23±0.01^b,1	−0.34±0.04^a
C. difficile–B. longum	−0.06±0.04^b,2	−0.32±0.07^a,2	−0.13±0.05^b,3	0.01±0.02^b,3	−0.43±0.13^a
C. difficile–B. breve	−0.02±0.02^d,2	−0.32±0.03^b,2	−0.07±0.01^c,4	0.00±0.01^d,3	−0.37±0.01^a
C. difficile–B. bifidum	−0.40±0.08^b,1	−0.56±0.02^a,1	−0.24±0.01^c,2	0.00±0.01^d,3	−0.34±0.01^b
C. difficile–B. animalis	−0.35±0.02^a,1	−0.31±0.03^a,2	−0.32±0.02^a,1	−0.03±0.00^b,2	−0.34±0.02^a

^*Different superscripts letters within the same row indicate statistically significant differences (p < 0.05) among carbon sources, whereas different superscript numbers within the same column denote differences (p < 0.05) among cultures.