| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Slackia heliotrinireducens | 1 | 2 | HMP |
| Slackia piriformis | 1 | 2 | MGYG |
| Sneathia sanguinegens | 1 | 1 | MGYG |
| Sneathia vaginalis | 1 | 1 | MGYG |
| Sodalis glossinidius | 1 | 2 | HMP |
| Solidesulfovibrio carbinoliphilus | 1 | 1 | HMP |
| Solidesulfovibrio magneticus | 1 | 1 | HMP |
| Solobacterium moorei | 1 | 4 | MGYG |
| Sorangium cellulosum | 1 | 6 | HMP |
| Sphaerobacter thermophilus | 1 | 1 | HMP |