**4.5 Fecal microbiota transplant**

Fecal microbiota transplant, or stool transplant also called bacteriotherapy, which is the process of replacing fecal bacteria from a healthy individual into a host individual has been quite effective in restoring GM composition. Fecal microbiota transplant is used in treating recurrent *Clostridium difficile colitis* recharging useful bacteria in the GI tract along with usage of antibiotics. Autologous infusion is reinfusion of one's collected feces and allogenic infusion is infusion with feces from a donor. Insulin resistant adults when autologously transplanted did not alter the GM composition but when transplanted with allogenic infusion from lean donors exhibited significant rise in GM diversity, enhanced levels of butyrate producing bacteria and improved sensitivity to insulin (**Table 2**) [114, 115].
