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Property Organism Value Units ID Details
Bacterial concentration in gut Mammals 10^13 - 10^14 bacteria/gram fecal matter 117012 Fortier LC, Sekulovic...
Viral concentration in gut Human Homo sapiens ≤10^8 viral particles/gram feces 117013 Fortier LC, Sekulovic...
Weight of bacteria in gut Human Homo sapiens 1.2 Kg 102755 Bocci V. The neglected...
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 E. coli in gut Human Homo sapiens 1e+8 Cells/gram gut content 104949 Macfarlane GT, Macfarlane S...
Concentration of prokaryotes in termite gut Termite Mastotermes darwiniensis 5.5e+9 Cells/ml 104951 Berchtold M, Chatzinotas A...
Escherichia coli bacteriophage concentration in gut Mammals human 10^3 - 10^4: cows and pigs ≤10^7 phages/gram feces 117014 Fortier LC, Sekulovic...
Concentration of microbes in human gut Microbes 10^11 - 10^12 microbes/ml 112466 Mahowald MA et al., ...
Doubling time for all bacteria in the gut Rodent hamster 48: guinea pig 17: mouse 5.8 hours 115543 Gibson B, Wilson DJ, Feil E...
Concentration of total anaerobic bacteria in gut Human Homo sapiens >1e+10 Cells/gram gut content 104948 Macfarlane GT, Macfarlane S...
Fraction of gut microbiota that are Firmicutes and Bacteroidetes Human Homo sapiens >90 % 107456 Lurie-Weinberger MN, Peeri M...
Average doubling time of bacteria in the mammalian gut bacteria 2.7 - 2.9 hours 117322 Rosenberg E. and Zil...
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...
Ratio between number of genes in human gut “metagenome” and human eukaryotic genome Human Homo sapiens >100 unitless 111317 De Filippo C. et al....
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....
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...
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...
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...
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...