Table 3.
List of the top 20 most abundant species in adult and elderly subjects and species with abundances higher than 1%
| Adult | Elderly | ||||
|---|---|---|---|---|---|
| Phylum | Speciesa | Relative abundanceb (%) | Phylum | Speciesa | Relative abundanceb (%) |
| Firmicutes | Faecalibacterium prausnitzii | 16.66 | Firmicutes | Faecalibacterium prausnitzii | 13.55 |
| Firmicutes | Blautia wexlerae | 6.18 | Proteobacteria | Escherichia coli | 8.40 |
| Bacteroidetes | Prevotella copri | 4.37 | Firmicutes | Blautia wexlerae | 7.49 |
| Proteobacteria | Escherichia coli | 4.25 | Firmicutes | Eubacterium rectale | 4.70 |
| Firmicutes | Eubacterium rectale | 3.42 | Bacteroidetes | Bacteroides vulgatus | 4.13 |
| Actinobacteria | Bifidobacterium adolescentis | 2.40 | Bacteroidetes | Prevotella copri | 2.68 |
| Proteobacteria | Klebsiella pneumoniae | 2.01 | Proteobacteria | Gemmiger formicilis | 1.84 |
| Firmicutes | Ruminococcus torques | 1.92 | Firmicutes | Ruminococcus torques | 1.70 |
| Firmicutes | Megamonas funiformis | 1.82 | Verrucomicrobia | Akkermansia muciniphila | 1.53 |
| Bacteroidetes | Bacteroides vulgatus | 1.77 | Firmicutes | Eubacterium hadrum | 1.44 |
| Firmicutes | Clostridium bartlettii | 1.72 | Firmicutes | Roseburia inulinivorans | 1.37 |
| Proteobacteria | Gemmiger formicilis | 1.55 | Proteobacteria | Klebsiella pneumoniae | 1.26 |
| Firmicutes | Ruminococcus gnavus | 1.52 | Firmicutes | Megamonas funiformis | 1.23 |
| Actinobacteria | Bifidobacterium longum | 1.36 | Bacteroidetes | Bacteroides uniformis | 1.21 |
| Firmicutes | Eubacterium hadrum | 1.32 | Firmicutes | Ruminococcus bromii | 1.21 |
| Firmicutes | Roseburia inulinivorans | 1.19 | Bacteroidetes | Bacteroides dorei | 1.13 |
| Actinobacteria | Bifidobacterium pseudocatenulatum | 1.19 | Firmicutes | Ruminococcus obeum | 1.12 |
| Firmicutes | Ruminococcus obeum | 1.15 | Bacteroidetes | Bacteroides massiliensis | 1.10 |
| Firmicutes | Clostridium clostridioforme | 1.10 | Firmicutes | Clostridium clostridioforme | 1.04 |
| Firmicutes | Ruminococcus bromii | 1.09 | Firmicutes | Eubacterium eligens | 1.02 |
aSpecies was determined by RDP Seqmatch with a cut off at ≥0.84 for the S_ab score
bSpecies were ranked based on the average relative abundance for each age group