| Genus | Species Num | Strain Num | SOURCE |
|---|---|---|---|
| Schaalia | 1 | 2 | HMP |
| Schleiferilactobacillus | 1 | 1 | MGYG |
| Sebaldella | 1 | 1 | HMP |
| Sediminispirochaeta | 1 | 1 | HMP |
| Segniliparus | 1 | 1 | HMP |
| Selenomonas | 5 | 5 | HMP/MGYG |
| Sellimonas | 1 | 1 | MGYG |
| Senegalimassilia | 1 | 1 | MGYG |
| Serratia | 6 | 6 | HMP/MGYG |
| Shewanella | 15 | 16 | HMP |