| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Bifidobacterium callitrichidarum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium callimiconis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium breve | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium boum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium bombi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium bohemicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium bifidum T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium biavatii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium avesanii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium asteroides | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium aquikefiri | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium apri | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium anseris | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium animalis subsp. lactis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium animalis subsp. animalis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium animalis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium angulatum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium aesculapii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium aerophilum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium aemilianum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium adolescentis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium actinocoloniiforme | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bifidobacterium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bibersteinia trehalosi T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bibersteinia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bhargavaea ullalensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bhargavaea ginsengi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bhargavaea cecembensis T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bhargavaea beijingensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Bhargavaea | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |