From incurable intestinal infections to metabolic syndrome, from melanoma, to chronic inflammatory bowel disease, such as irritable bowel syndrome, to Tourette's syndrome: many diseases can potentially be cured by Fecal Microbiota Transplantation (FMT), and researchers from the Catholic University, Rome and the University of Trento have shown that the greater the level of engraftment of the transplanted microorganisms, the greater the chances of success of the therapy.