Abstract

To review the efficacy, safety, and role of live biotherapeutic products (LBPs) in the prevention of recurrent Clostridioides difficile infection (rCDI). A literature search was performed using PubMed and Google Scholar (through February 2024) with search terms RBX2660, SER-109, and fecal microbiota. Other resources included abstracts presented at recent conferences, national clinical practice guidelines, and manufacturers' websites. All relevant studies, trial updates, conference abstracts, and guidelines in the English language were included. Two LBPs were recently approved by the Food and Drug Administration for the prevention of recurrence in adults following antibiotic treatment for rCDI. Fecal microbiota, live-jslm is administered rectally as a retention enema, whereas fecal microbiota spores, live-brpk is given orally after bowel preparation. Several phase 2 and phase 3 clinical trials have established the safety and efficacy of these LBPs in reducing rates of rCDI compared with placebo. Patients with severe immunosuppression and those with inflammatory bowel disease were largely excluded from these trials. Live biotherapeutic products offer a similar mechanism to conventional fecal microbiota transplant (FMT) in preventing rCDI through microbiota restoration. The primary advantages of LBPs over FMT are their standardized composition and donor stool screening processes for transmissible pathogens. Bezlotoxumab is also available for the prevention of Clostridioides difficile infection; however, there are no clinical data available to compare the efficacy of LBPs with bezlotoxumab, and the benefit of simultaneous use of these preventative therapies is unclear. Live biotherapeutic products provide a safe and effective option for the prevention of rCDI and represent an improvement over conventional FMT. Additional studies are needed to further determine their place in therapy relative to bezlotoxumab and in the setting of immunosuppression and inflammatory bowel disease.

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