TABLE 4.
Overall relative abundances (%) of the 4 most abundant phyla averaged across all time points for infant feces and oral samples, maternal feces, oral, and milk samples1
| Sample type | Phyla | Relative abundance (%) |
|---|---|---|
| Infant feces | Firmicutes | 39.3 ± 2.6 |
| Proteobacteria | 27.6 ± 2.1 | |
| Bacteroidetes | 26.4 ± 2.1 | |
| Actinobacteria | 6.1 ± 0.9 | |
| Infant oral | Firmicutes | 89.3 ± 1.4 |
| Actinobacteria | 6.6 ± 1.0 | |
| Bacteroidetes | 2.1 ± 0.5 | |
| Proteobacteria | 1.8 ± 0.6 | |
| Maternal feces | Firmicutes | 52.3 ± 1.1 |
| Bacteroidetes | 41.7 ± 1.1 | |
| Proteobacteria | 3.3 ± 0.3 | |
| Actinobacteria | 1.2 ± 0.2 | |
| Maternal oral | Firmicutes | 71.2 ± 1.1 |
| Proteobacteria | 9.9 ± 0.6 | |
| Bacteroidetes | 8.3 ± 0.6 | |
| Actinobacteria | 8.0 ± 0.5 | |
| Milk | Firmicutes | 86.9 ± 1.2 |
| Actinobacteria | 6.8 ± 0.8 | |
| Proteobacteria | 4.2 ± 0.8 | |
| Bacteroidetes | 1.8 ± 0.3 |
1
Values are means ± SEM; infant feces, n = 149; infant oral, n = 151; maternal feces, n = 162; maternal oral, n = 182; milk, n = 147.