Microbiome drug for reducing CDI recurrence safe, may be more effective at higher doses
SER-109, an investigational microbiome drug consisting of a consortium of bacterial spores from healthy donors to prevent recurrent Clostridioides difficile infection (CDI), has shown a favourable safety profile in a phase II trial. Early engraftment of SER-109 dose-species helps reduce the risk of recurrence, although engraftment kinetics suggests a higher dosing to increase efficacy.