From a microbial perspective, the human colon is a teeming metropolis, home to the most densely populated collection of microbes on the planet. Remarkably, these organisms are not only tolerated but also often required for normal body functioning—as much a part of human biology as our own cells. “We’re used to thinking about microbes as enemies—as major threats to our health—but most microbes don’t cause disease. They actually help us…
Bugs in the System
