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Table 1 Growth and metabolic parameters of B. fragilis grown in glucose, EPS or without carbon source

From: Bacteroides fragilis metabolises exopolysaccharides produced by bifidobacteria

Carbon source Time (h) Acetic acid Propionic acid Lactic acid Succinic acid Formic acid Total metabolites* Acetic/Propionic Propionic/Succinic Acetic/Lactic Bacterial counts+
Glucose 24 13.00 ± 0.41D 4.35 ± 0.63C 14.81 ± 0.27B 3.46 ± 0.19a B 7.33 ± 0.15D 42.95 ± 1.40a C 3.02 ± 0.35C 1.25 ± 0.12A 0.88 ± 0.01A 9.58 ± 0.07d C
  48 13.28 ± 0.74C 4.69 ± 0.21C 17.11 ± 1.26B 3.75 ± 0.27a B 6.86 ± 0.38D 45.73 ± 1.22ab D 2.83 ± 0.08D 1.25 ± 0.13A 0.78 ± 0.07A 8.47 ± 0.16c B
  72 13.80 ± 0.53C 5.04 ± 0.47D 16.15 ± 1.01B 4.37 ± 0.18b C 7.59 ± 0.12C 47.11 ± 0.41b C 2.75 ± 0.18D 1.15 ± 0.09A 0.86 ± 0.09 7.76 ± 0.06b A
  144 13.66 ± 0.26D 4.96 ± 0.32D 15.27 ± 0.87B 4.56 ± 0.52b B 7.26 ± 0.45C 46.02 ± 1.96ab D 2.76 ± 0.15C 1.09 ± 0.06A 0.90 ± 0.05A 7.46 ± 0.17a B
EPS E44 24 1.24 ± 0.06b B 0.78 ± 0.08b A,B 0.45 ± 0.07b A 0.12 ± 0.02A 0.43 ± 0.04a B 3.01 ± 0.11a B 1.60 ± 0.10a B 6.78 ± 0.27D 2.83 ± 0.53a A 9.17 ± 0.12c B
  48 0.93 ± 0.08a A,B 0.39 ± 0.08a A 0.95 ± 0.05c A - 1.27 ± 0.24b C 3.56 ± 0.22b C 2.44 ± 0.30b C ND 0.98 ± 0.12a A 8.91 ± 0.02b C
  72 1.89 ± 0.10c B 0.95 ± 0.13b B 0.77 ± 0.08c A - 1.67 ± 0.46b B 5.31 ± 0.34c B 2.01 ± 0.19ab C ND 2.48 ± 0.38a 9.05 ± 0.05bc B
  144 5.53 ± 0.08d C 2.75 ± 0.13c C 0.26 ± 0.15a A 0.13 ± 0.05A 1.40 ± 0.31b B 10.07 ± 0.39d C 2.01 ± 0.12ab B 25.22 ± 11.55B 26.24 ± 12.29b A 8.68 ± 0.14a C
EPS R1 24 1.70 ± 0.11a C 1.37 ± 0.12b B 0.16 ± 0.10b A 0.26 ± 0.05b A 0.73 ± 0.25a C 4.22 ± 0.09a B 1.25 ± 0.03a B 5.40 ± 0.54b C 14.03 ± 7.32a B 9.01 ± 0.09b B
  48 1.40 ± 0.22a B 0.82 ± 0.12a B 0.49 ± 0.09c A 0.15 ± 0.01a A 1.92 ± 0.12c B 4.81 ± 0.37b B 1.70 ± 0.08b B 5.64 ± 0.55b B 2.86 ± 0.12a B 9.17 ± 0.09b D
  72 2.08 ± 0.10b B 1.44 ± 0.16b C 0.12 ± 0.09b A 0.26 ± 0.00b B 1.35 ± 0.18b B 5.25 ± 0.09b B 1.45 ± 0.11a B 5.62 ± 0.62b B 25.26 ± 19.65a 9.15 ± 0.13b B
  144 3.13 ± 0.18c B 1.70 ± 0.09c B 0.02 ± 0.01a A 0.53 ± 0.02c A 1.27 ± 0.26b B 6.65 ± 0.34c B 1.85 ± 0.20b B 3.21 ± 0.29a A >100b B 6.73 ± 0.21a A
WCS 24 0.21 ± 0.05a A 0.26 ± 0.03a A - 0.11 ± 0.07a A 0.09 ± 0.03a A 0.72 ± 0.12a A 0.79 ± 0.12A 2.33 ± 0.43 B ND 8.36 ± 0.15c A
  48 0.27 ± 0.05a A 0.34 ± 0.03b A - 0.21 ± 0.01b A 0.17 ± 0.03b A 1.01 ± 0.05a A 0.79 ± 0.10A 1.66 ± 0.21A ND 8.10 ± 0.06c A
  72 0.35 ± 0.06a A 0.36 ± 0.00b A - 0.20 ± 0.03b A 0.17 ± 0.04b A 1.08 ± 0.02a A 0.99 ± 0.16A 1.83 ± 0.29 A ND 7.84 ± 0.11b A
  144 0.66 ± 0.22b A 0.51 ± 0.05c A - 0.23 ± 0.05b A 0.26 ± 0.03c A 1.68 ± 0.35b A 1.28 ± 0.30A 2.30 ± 0.36 A ND 6.61 ± 0.19a A
  1. Metabolite concentrations are expressed in mM, bacterial counts are expressed in ufc mL−1 Columns for the same carbon source with different lower case letter superscripts indicate significant differences along time (p > 0.05). Different capital letters superscripts indicate significant differences among carbon sources at the same sampling point (p < 0.05). * Sum of acetic, propionic, lactic, succinic, formic and pyruvic acids. + Counts at 0 h were 7.02 ± 0.08 log ufc mL−1. WCS without carbon source. -, under the detection limit, ND Not determined