““The procedure works along the same principles as a probiotic, but rather than adding just one strain of bacteria, or even 17, it adds all of them. It's an ecosystem transplant-an attempt to fix a faltering community by completely replacing it, like returfing a lawn that's overrun by dandelions. Khoruts showed this process at work by collecting stool samples from Rebecca before and after her transplant. Beforehand, her gut was a mess. The C-diff infection had completely restructured her microbiome, creating a community that "looked like something that doesn't exist in nature-a different galaxy", says Khoruts. Afterwards, her microbiome was indistinguishable from her husband's. His microbes had stormed into her dysbiotic gut and reset it. It was almost as if Khoruts had done an organ transplant, throwing out his patient's diseased and damaged gut microbiome and replacing it with the donor's shiny new one. This makes the microbiome the only organ that can be replaced without surgery.””
