Long-term stability and efficacy of frozen fecal microbiota transplant (FMT) product at 24 months.

Background: Freezing donor fecal microbiota has improved fecal microbiota transplantation (FMT) for recurrent C. difficile infection (CDI), achieving short-term effectiveness similar to fresh-samples. Research shows frozen fecal matter remains effective for up to 12-months at -80 °C.