Tweet Do diet and other environmental factors largely influence microbial composition in the gut, or is this mostly determined by the species of the host? This is a question that has supportive research on each side, but a new paper by Ochman et al. offers more clarity on the issue.

Tweet This will no doubt make news when it is published (though I can already picture the absurd headlines): From this years General Meeting for the American Society for Microbiology, there was a very intriguing interview. Mycobacterium vaccae, found in soil, previously known to effect serotonin among other things when injected in mice, and improve mood [...]