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Property Organism Value Units ID Details
Number of bacterial species in gut Human Homo sapiens total >1,000: in gut of any individual ~160 species 113400 Rowland I et al., Gut...
Phage/prokaryote host ratio in gut Human Homo sapiens ~10 phage/prokaryotic host cell 113938 Pfeiffer JK, Virgin HW....
Concentration of microbes in human gut Microbes 10^11 - 10^12 microbes/ml 112466 Mahowald MA et al., ...
Weight of bacteria in gut Human Homo sapiens ~1.2 Kg 102755 Bocci V. The neglected...
Fraction of gut microbiota that are Firmicutes and Bacteroidetes Human Homo sapiens >90 % 107456 Lurie-Weinberger MN, Peeri M...
Concentration of total anaerobic bacteria in gut Human Homo sapiens >1e+10 Cells/gram gut content 104948 Macfarlane GT, Macfarlane S...
Fraction of viral forms (in gut virome) that persisted over the 2.5-y time course studied Human Homo sapiens ~80 % 110710 Minot S, Bryson A, Chehoud C...
Time of transit of gut contents through large bowel Human Homo sapiens 60 (20 - 140 (range in United Kingdom)) hours 112837 G. T. Macfarlane and...
Concentration of prokaryotes in termite gut Termite Mastotermes darwiniensis 5.5e+9 Cells/ml 104951 Berchtold M, Chatzinotas A...
Concentration of E. coli in gut Human Homo sapiens ~1e+8 Cells/gram gut content 104949 Macfarlane GT, Macfarlane S...
Bacterial content of mammalian gut derived from bacterial 16S ribosomal RNA gene sequences bacteria Firmicutes 65.7%: Bacteroidetes 16.3%: Proteobacteria 8.8%: see Comments section for the rest % 112854 Ley RE et al., Evolution...
Concentration of virus-like particles (VLP) on surface of gut mucosa Human Homo sapiens in healthy subjects ≤10^8: in subjects affected by Crohn's disease ≤4×10^9 VLP/ml 112503 Letarov A, Kulikov E....
Fraction of total body serotonin that is released into the gut by intestinal enterochromaffin cells Unspecified ~95 % 113115 Berger M, Gray JA, Roth...
Ratio between number of genes in human gut “metagenome” and human eukaryotic genome Human Homo sapiens >100 unitless 111317 De Filippo C. et al....
Estimated maximal percent of daily reference intake (DRI) of B vitamins that could be provided by the gut microbiota Human Homo sapiens Table - link N/A 113402 Rowland I et al., Gut...
Percent of well-studied microbial communities, such as the human distal gut, that have been cultured Microbes 20 to 40 % 109669 Huse SM, Dethlefsen L...
Fraction of all anaerobes in the colon of healthy human adults that is M. smithii, the most common archaeon in human gut Archaea Methanobrevibacter smithii ≤10 % 107457 Lurie-Weinberger MN, Peeri M...
Concentration of Plancomycetes bacteria in P3 alkaline compartment of hindgut Termite Cubitermes spp 2.6e+9 cells/ml 104950 Köhler T, Stingl U, Meuser K...
Summary of results of genome finishing for E. rectale strain ATCC 33656 and E. eligens strain ATCC 27750 bacteria Table - link N/A 112467 Mahowald MA et al., ...