dental plaque ~10^11bacteria/g: saliva 10^8–10^9bacteria/mL: feces 10^11–10^12bacteria/g
||Human Homo sapiens
||Dueñas M et al., Studies on Modulation of Gut Microbiota by Wine Polyphenols: From Isolated Cultures to Omic Approaches. Antioxidants (Basel). 2015 Jan 5 4(1):1-21. doi: 10.3390/antiox4010001. p.5 top paragraphPubMed ID26785335
|| Maukonen, J. Motto, J. Suihko, M.L. Saarela, M. Intra-individual diversity and similarity of salivary and faecal microbiota. J. Med. Microbiol. 2008, 57, 1560–1568. DOI: 10.1099/jmm.0.47352-0PubMed ID19018030
||P.5 top paragraph: "4. Gut Microbiota: The orogastrointestinal tract of humans has an abundant microbiota dominated by anaerobic bacteria. The number of bacteria in the oral cavity is about 10^11 bacteria/g in dental plaque and 10^8–10^9 bacteria/mL in saliva, whereas in feces the corresponding numbers are 10^11–10^12 bacteria/g [primary source]. More precisely, the gut microbial ecosystem includes native species that permanently colonize the gastrointestinal tract, and a variable number of live microorganisms that temporarily pass through the digestive tract [ref 4]. Native bacteria are mainly acquired at birth and during the first year of life, whereas transient bacteria are continuously being ingested from food, drinks and the environment."