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Property Organism Value Units ID Details
Fraction of total body serotonin that is released into the gut by intestinal enterochromaffin cells Unspecified ~95 % 113115 Berger M, Gray JA, Roth...
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 microflora that are yeast strains Human Homo sapiens <0.1 % 113405 Saber A et al., Cellular...
Fraction of all bacteria isolated from the gastrointestinal tracts of rodents that is M. schaedleri Bacteria Mucispirillum schaedleri ~27 % 115618 Young KD. The selective...
Increase in calorie intake required to maintain body weight in germ-free rats Rat Rattus norvegicus 30 % 102389 Hooper LV, Gordon JI....
Number of species of bacteria in mammalian large intestine bacteria 400-500 unitless 105655 Peekhaus N, Conway T....
Ratio between anaerobic bacteria and Escherichia coli in the bowel (most probably of humans) Unspecified 100-10,000 anaerobic bacterial cells/E. coli cell 116910 Tenaillon O, Skurnik D...
Fraction of flatus that is carbon dioxide Human Homo sapiens 5 - 50 % 113401 Rowland I et al., Gut...
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., ...
Number of bacterial species-level and genus-level operational taxonomic units (OTUs) in human and worm & phylotype number in termite Metazoa animals species-level OTUs in human ~1,000: genus-level OTUs in worm 832: phylotypes in termite hindgut 216 OTUs/phylotypes per individual 113942 Shapira M. Gut Microbiotas...
Amount of bacteria in hindgut Termite 1.3e+6 to 4.3e+9 Cells/gut 108554 Schultz JE, Breznak JA....
Amount of bacteria in hindgut Termite Reticulitermes flavipes 2.7e+6 Cells/gut 108557 Schultz JE, Breznak JA....
Number of bacteria in orogastrointestinal tract (oral cavity and feces) Human Homo sapiens dental plaque ~10^11bacteria/g: saliva 10^8–10^9bacteria/mL: feces 10^11–10^12bacteria/g N/A 112857 Dueñas M et al., Studies...
Concentration of Escherichia coli (in colony forming units=cfu) in faeces Human Homo sapiens in infancy >10^9 cfu/gram of faeces: after age 2 ~10^8 cfu/gram of faeces, gradually decreasing in the elderly cfu/gram of faeces 116916 Tenaillon O, Skurnik D...
Turnover time of gastrointestinal (GI) mucosa (probably in human) Unspecified 2 - 3 days 112311 Rubio CA. The Natural...
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...
Prevalence of Escherichia coli Vertebrates humans >90%: wild mammals 56%: birds 23%: reptiles 10 % 116911 Tenaillon O, Skurnik D...
Fraction of 16S rDNAs molecular species that correspond to known organisms in fecal sample Human Homo sapiens 24 % 110959 Suau A et al., Direct...
Moisture content in feces Human Homo sapiens 26 % 110960 Suau A et al., Direct...
Numbers of nuclear and cytoplasmic mRNAs per cell in MIN6 cells and liver cells Mouse Mus musculus Excel Table - link mRNAs/cell 112415 Bahar Halpern K et al....