Molecular biology/Microbiome

The Microbiome of the human body is the totality of microbes, their genomes, and their environmental interactions.

Total microbial cells found in association with humans may exceed the total number of cells making up the human body by a factor of ten-to-one. The total number of genes associated with the human microbiome could exceed the total number of human genes by a factor of 100-to-one. Many of these organisms have not been successfully cultured, identified, or otherwise characterized. Organisms expected to be found in the human microbiome, however, may generally be categorized as bacteria (the majority), members of domain Archaea, yeasts, and single-celled eukaryotes as well as various helminth parasites and viruses, the latter including viruses that infect the cellular microbiome organisms (e.g., bacteriophages, the viruses of bacteria).

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