Bacterial therapy, also known as bacterial biotherapy or bacteriotherapy, is a medical treatment that involves the use of beneficial bacteria to treat various health conditions. However, there are many other synonyms that are used to describe this therapeutic approach. Some of the most common ones include probiotic therapy, fecal microbiota transplantation (FMT), microbiome therapy, bacterial replacement therapy, and bacterial restoration therapy. All of these terms refer to the same medical treatment that involves the use of live bacteria to improve or restore the balance of the microbiome in the human body. Regardless of the name, bacterial therapy has shown promising results in treating many health conditions, including digestive disorders and autoimmune disease.