Fecal microbiota transplantation (FMT) achieves the purpose of treating intestinal and extra-intestinal diseases by transplanting the functional microbes in the feces of healthy people into the patient's intestine through the upper or lower alimentary tract routes to rebuild the patient's intestinal microbiota.

Document adverse events related to FMT that occurred during the study, including their frequency and severity.

The efficacy of FMT in SIBO patients was evaluated according to the scores of gastrointestinal symptoms before and after treatment. Patients with gastrointestinal symptom scores, including some of the abdominal symptoms and defecation situation, we can according to this questionnaire to assess patients with abdominal symptoms and defecate on the improvement of their situation.

For patients before and after the FMT feces and small intestinal juice samples 16 s rRNA sequencing, compare the difference between before and after the FMT feces and bacteria in the intestinal flora of diversity, species composition belong. The changes of commensal bacteria, opportunistic pathogens and pathogenic bacteria in feces and small intestinal fluid after FMT were compared.