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Table 1 Azo-reducing activity of fresh stool samples against 0.06 M Brilliant Black

From: Compositional variation of the human fecal microbiome in relation to azo-reducing activity: a pilot study

Sample number Azo-reducing activity grade Time to full decolorization (h) % Decolorization at the end of the experiment (10 h) expressed as mean (± SD)%
S9 Grade zero (no degradation) > 10 0 (± 1.8)%
S4 > 10 0 (± 0.8)%
S15 > 10 0 (± 1.4)%
S5 > 10 2.7 (± 1.2)%
S12 > 10 8.6 (± 1.1)%
S3 > 10 9.5 (± 2.6)%
S10 Grade one (partial degradation) > 10 35.6 (± 0.77)%
S14 > 10 57.2 (± 0.55)%
S2 Grade two (complete degradation) ~ 9.8 ~ 100% (by projection)
S13 9 100%
S1 8–9 100%
S8 7–8 100%
S6 7 100%
S16 7 100%
S11 6–7 100%
S7 5 100%
  1. Samples were assigned to one of three grades (zero, one and two) according to the completeness of dye decolorization, as well as the percent decolorization, at the end of the experiment