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. Author manuscript; available in PMC: 2014 Jul 28.
Published in final edited form as: Curr Opin Microbiol. 2011 Dec 30;15(2):147–154. doi: 10.1016/j.mib.2011.12.009

Figure 1. The bacterial chemical repertoire as metabolic exchange factors within the gut microbiome.

Figure 1

A. The human digestive tract is populated by diverse bacteria, forming the microbiome, from esophagus to anus. B. A fluorescence confocal microscopy image of the small intestine. C. A schematic illustrating hypothetical metabolic exchange between host, Escherichia coli and Klebsiella pneumonia. Metabolic exchange can be intraspecies (e.g. quorum-sensing), interspecies, or host-symbiont communication.