"Fecal transplants—where doctors try to cure sick people of various ills by giving them the stools of healthy donors—have been used since at least fourth-century China, according to texts that make reference to 'yellow soup.' The unusual treatment has been rediscovered many times since, but it’s finally starting to enter the medical mainstream. Partly, that’s because of a surge of interest in the microbiome—the trillions of microbes that share our bodies. Partly, it’s because many well-conducted studies have shown that fecal transplants are incredibly effective at treating Clostridium difficile—a nasty, hardy bacterium that causes severe, recurring, and potentially fatal bouts of diarrhea."
See the video here.