| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Bifidobacterium pseudolongum | 1 | 95 | MGYG |
| Bifidobacterium pullorum | 2 | 14 | MGYG |
| Bifidobacterium ruminantium | 1 | 5 | MGYG |
| Bifidobacterium scardovii | 1 | 5 | MGYG |
| Bifidobacterium thermacidophilum | 1 | 3 | MGYG |
| Bilophila wadsworthia | 1 | 5 | MGYG |
| Bittarella massiliensis | 1 | 7 | MGYG |
| Blastopirellula marina | 1 | 6 | HMP |
| Blattabacterium sp. (Periplaneta americana) | 1 | 1 | HMP |
| Blautia hansenii | 2 | 4 | HMP/MGYG |