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Frequencies of approximately 200 species of bacteria distributed across about a dozen phyla. (a) Group 1 depicts the relative abundance distribution for healthy individuals while (b) Group 2 shows the pattern for irritable bowel syndrome (IBD) patients. The differences in abundance patterns are apparent and have been quantified using the Shannon index for each individual plotted in (c). From Park et al [102]. (a) Group 1. (b) Group 2.
