Pilot Feasibility Study of Fecal Microbiota Transplant for the Treatment of Small Intestinal Bacterial Overgrowth

Inclusion Criteria: * Patients 3-18 years old * Patients will discontinue antibiotics for at least 1 week prior to FMT * A diagnosis of SIBO established through lactose breath test (LBT), and showing of symptoms of SIBO Exclusion Criteria: * Participants will not be permitted to start any new treatments (including antibiotics, probiotics, antacid treatments, or antimotility treatments) until Week 8, unless clinically indicated * We will exclude participants \<3yo to avoid potential concerns of microbial transmission in young children, and to ensure participants are developmentally able to perform LBT * All potential participants should request a referral through their primary, or subspecialty physician. We would be pleased to help facilitate this contact if needed, provided the appropriate contact information can be sent.