Microbial Symbioses with Humans - Gastrointestinal Microbiota

3 important questions on Microbial Symbioses with Humans - Gastrointestinal Microbiota

What are the three different general enterotypes? What are they enriched in?

  • Enterotype 1: enriched in bacteroides
  • Enterotype 2: enriched in prevotella
  • Enterotype 3: enriched in ruminococcus

What are the functions of the gastro intestinal microbiota?

  • Metabolism of xenobiotics
  • Intestine functioning is stimulated
  • Development and activity of the immune system

What are the products of the intestinal microbiota?

  • Vitamins (thiamine, riboflavine, pyridoxine, B12, K)
  • Gas (CO2, CH4, H2)
  • Odor (H2S, NH3, amines, indole)
  • Organic acids (acetic, propionic, butyric acids)
  • Enzymes (glycosidase reactions)
  • Steroid metabolites (esterified, dehydroxylated, oxidzied, or reduced)
  • Neurotransmitters (tryptamine, 4-ethylphenylsulphate)

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