| bacilli bacterium | No | species | | | species | 1903720 | click here |
| bacillus altitudinis | No | species | bacteria | bacteria | species | 293387 | click here |
| bacillus amyloliquefaciens | No | species | bacteria | bacteria | species | 1390 | click here |
| bacillus coagulans | No | species | bacteria | bacteria | species | 1398 | click here |
| bacillus licheniformis | No | species | bacteria | bacteria | species | 1402 | click here |
| bacillus megaterium | No | species | bacteria | bacteria | species | 1404 | click here |
| bacillus paramycoides | No | species | | | species | 2026194 | click here |
| bacillus sp. nh7i_1 | No | no rank | | | species | 1326968 | click here |
| bacillus subtilis | No | species | bacteria | bacteria | species | 1423 | click here |
| bacillus velezensis | No | species | bacteria | bacteria | species | 492670 | click here |
| bacterium | No | no rank | | | species | 1869227 | click here |
| bacteroidales bacterium | No | species | | | species | 2030927 | click here |
| bacteroides eggerthii | No | species | bacteria | bacteria | species | 28111 | click here |
| bacteroides fragilis | No | species | bacteria | bacteria | species | 817 | click here |
| bacteroides heparinolyticus | No | species | bacteria | bacteria | species | 28113 | click here |
| bacteroides plebeius | No | species | bacteria | bacteria | species | 310297 | click here |
| bacteroides pyogenes | No | species | bacteria | bacteria | species | 310300 | click here |
| bacteroides sp. | No | no rank | bacteria | bacteria | species | 29523 | click here |
| bacteroides stercoris | No | species | bacteria | bacteria | species | 46506 | click here |
| bacteroides thetaiotaomicron | No | species | bacteria | bacteria | species | 818 | click here |
| bacteroides uniformis | No | species | bacteria | bacteria | species | 820 | click here |
| bacteroides vulgatus | No | species | bacteria | bacteria | species | 821 | click here |
| bacteroides xylanisolvens | No | species | bacteria | bacteria | species | 371601 | click here |
| banna virus | No | species | viruses and viroids | viruses | species | 77763 | click here |
| batai virus | No | no rank | viruses and viroids | viruses | no rank | 80942 | click here |
| baylisascaris procyonis | No | species | eukaryota | invertebrates | species | 6259 | click here |
| bergeyella zoohelcum | No | species | bacteria | bacteria | species | 1015 | click here |
| betaarterivirus suid 1 | No | species | | | species | 2499680 | click here |
| betaarterivirus suid 2 | No | species | | | species | 2499685 | click here |
| bifidobacterium animalis | No | species | bacteria | bacteria | species | 28025 | click here |
| bifidobacterium animalis subsp. lactis | No | subspecies | bacteria | bacteria | subspecies | 302911 | click here |
| bifidobacterium boum | No | species | bacteria | bacteria | species | 78343 | click here |
| bifidobacterium longum | No | species | bacteria | bacteria | species | 216816 | click here |
| bifidobacterium pseudolongum | No | species | bacteria | bacteria | species | 1694 | click here |
| bifidobacterium psychraerophilum | No | species | bacteria | bacteria | species | 218140 | click here |
| bifidobacterium sp. b-13 | No | no rank | | | species | 1981082 | click here |
| bifidobacterium sp. b-3 | No | no rank | | | species | 1981072 | click here |
| bifidobacterium sp. c-2 | No | no rank | | | species | 1981071 | click here |
| bifidobacterium thermacidophilum | No | species | bacteria | bacteria | species | 246618 | click here |
| bifidobacterium thermophilum | No | species | bacteria | bacteria | species | 33905 | click here |
| bilophila wadsworthia | No | species | bacteria | bacteria | species | 35833 | click here |
| blastocystis sp. | No | species | eukaryota | plants | species | 46767 | click here |
| blastocystis sp. subtype 1 | No | no rank | eukaryota | plants | species | 944036 | click here |
| blastocystis sp. subtype 15 | No | no rank | | | species | 1260463 | click here |
| blastocystis sp. subtype 3 | No | no rank | eukaryota | plants | species | 944168 | click here |
| blastocystis sp. subtype 5 | No | no rank | eukaryota | plants | species | 944169 | click here |
| blastocystis sp. sy94-3 | No | no rank | eukaryota | plants | species | 170832 | click here |
| blautia glucerasea | No | species | bacteria | bacteria | species | 536633 | click here |
| blautia sp. | No | species | | | species | 1955243 | click here |
| bocaparvovirus sp. | No | species | | | species | 1883111 | click here |
| border disease virus | No | species | viruses and viroids | viruses | species | 358764 | click here |
| bordetella bronchiseptica | No | species | bacteria | bacteria | species | 518 | click here |
| bordetella bronchiseptica km22 | No | no rank | | | no rank | 1427985 | click here |
| bourgelatia diducta | No | species | | | species | | click here |
| bovine faeces associated circular dna molecule 1 | No | no rank | | | species | 1843763 | click here |
| bovine viral diarrhea virus 1 | No | species | viruses and viroids | viruses | species | 11099 | click here |
| bovine viral diarrhea virus 2 | No | no rank | viruses and viroids | viruses | no rank | 54315 | click here |
| brachyspira hampsonii | No | species | | | species | 1287055 | click here |
| brachyspira hyodysenteriae | No | species | bacteria | bacteria | species | 159 | click here |
| brachyspira innocens | No | species | bacteria | bacteria | species | 13264 | click here |
| brachyspira murdochii | No | species | bacteria | bacteria | species | 84378 | click here |
| brachyspira pilosicoli | No | species | bacteria | bacteria | species | 52584 | click here |
| brachyspira sp. h29 | No | no rank | | | species | 1335466 | click here |
| brucella suis | No | species | bacteria | bacteria | species | 29461 | click here |
| brucella suis bv. 1 str. bcb025 | No | no rank | | | no rank | 1210444 | click here |
| brucella suis bv. 2 str. bcb032 | No | no rank | | | no rank | 1210448 | click here |
| butyricicoccus porcorum | No | species | | | species | 1945634 | click here |
| butyricimonas virosa | No | species | bacteria | bacteria | species | 544645 | click here |
| butyrivibrio crossotus | No | species | bacteria | bacteria | species | 45851 | click here |
| butyrivibrio sp. | No | no rank | bacteria | bacteria | species | 28121 | click here |
| butyrivibrio sp. b-7 | No | no rank | | | species | 1981076 | click here |
| calicivirus pig/nc-qw266/usa/2003 | No | no rank | | | species | 1028730 | click here |
| calicivirus pig/nc-wgp117/usa/2009 | No | no rank | | | species | 1028731 | click here |
| calicivirus pig/nc-wgp128/usa/2009 | No | no rank | | | species | 1028732 | click here |
| calicivirus pig/nc-wgp6a/usa/2009 | No | no rank | | | species | 1028733 | click here |
| calliphora vicina | No | species | eukaryota | invertebrates | species | 7373 | click here |
| calliphora vomitoria | No | species | eukaryota | invertebrates | species | 27454 | click here |
| campylobacter coli | No | species | bacteria | bacteria | species | 195 | click here |
| campylobacter coli bigs0005 | No | no rank | | | no rank | 1247730 | click here |
| campylobacter coli bigs0015 | No | no rank | | | no rank | 1247738 | click here |
| campylobacter hyointestinalis | No | species | bacteria | bacteria | species | 198 | click here |
| campylobacter hyointestinalis subsp. lawsonii | No | subspecies | bacteria | bacteria | subspecies | 91353 | click here |
| campylobacter jejuni | No | species | bacteria | bacteria | species | 197 | click here |
| campylobacter lanienae | No | species | bacteria | bacteria | species | 75658 | click here |
| campylobacter sp. | No | no rank | bacteria | bacteria | species | 205 | click here |
| candida albicans | No | species | eukaryota | plants | species | 5476 | click here |
| candida parapsilosis | No | species | eukaryota | plants | species | 5480 | click here |
| candida tropicalis | No | species | eukaryota | plants | species | 5482 | click here |
| candidatus methanomethylophilus alvus | No | species | | | species | 1291540 | click here |
| capillaria erinacea | No | species | | | species | | click here |
| catenibacterium mitsuokai | No | species | bacteria | bacteria | species | 100886 | click here |
| catenibacterium sp. b-12 | No | no rank | | | species | 1981081 | click here |
| cellulosimicrobium aquatile | No | species | | | species | 1612203 | click here |
| chicken picobirnavirus | No | species | viruses and viroids | viruses | species | 1930304 | click here |
| chilomastix mesnili | No | species | eukaryota | invertebrates | species | 472572 | click here |
| chlamydia abortus | No | species | bacteria | bacteria | species | 83555 | click here |
| chlamydia pecorum | No | species | bacteria | bacteria | species | 85991 | click here |
| chlamydia psittaci | No | species | bacteria | bacteria | species | 83554 | click here |
| chlamydia suis | No | species | bacteria | bacteria | species | 83559 | click here |
| christensenellaceae bacterium | No | species | | | species | 2054177 | click here |