Composition of the human gastrointestinal microflora

Range Table - link CFU/ml or CFU/g
Organism Human Homo sapiens
Reference A. Lidbeck and C. E. Nord, Lactobacilli, Normal Human Microflora and Antimicrobial Treatment, chapter 6 in Human Health: The Contribution of Microorganisms, Edited by S. A. W. Gibson, Springer-Verlag 1994 link , p.97 table 6.1
Primary Source Nord CE, Kager L (1984) The normal flora of the gastrointestinal tract. Netherlands J Med 27:249-252PubMed ID6493406
Comments P.98 top paragraph: "In the colon the bacterial counts increase dramatically to numbers of 10^10-10^12 CFU/g. Anaerobic bacteria, such as Bacteroides and Bifidobacterium, are the predominant species found in this region and the anaerobic bacteria outnumber the aerobic bacteria by a factor of 1000:1 (Nord and Kager 1984). One third of the faecal dry weight consists of bacteria. The composition of the gastrointestinal flora is presented in Table 6.1."
Entered by Uri M
ID 112843