Fecal Microbiota Transplantation has a ~99% success rate for treating C. difficile by reestablishing a healthy gut microbiome.

“so one of the concepts was really to kind of go in the reverse Direction and say okay if the problem is that now there's no competition and this guy can propagate unchecked what if we just load up the the person's gut with uh you know all these different microbes reestablish an ecosystem and then that's the way to kind of temper this thing down and that's called a microbiome transplant where you it's exactly what it sounds like you literally take feces from a person and Transplant it into another person that thing has like a 99% success rate”