Long-Term Follow-Up After Fecal Microbiota Transplantation via Freeze-Dried Capsules for Recurrent Clostridioides difficile Infection

Background: infection (CDI). Limited information is available on the durability of response after FMT via freeze-dried oral capsules and on whether patients who fail an initial FMT can be successfully managed with repeated FMT. Methods: We conducted a retrospective cohort study of all patients undergoing initial FMT for recurrent CDI via freeze-dried capsules from March 2015 through June 2022 at 2 acute-care hospitals. Information on response to FMT during the initial management period (ie, 3 months after the initial FMT) and long-term durability of response was collected through direct communication with patients and medical record review. Episodes occurring within 90 days of the initial FMT were defined as recurrences, whereas those occurring more than 90 days after the initial FMT were defined as additional CDI episodes. Results: Of 129 patients with recurrent CDI treated with FMT via freeze-dried capsules, 114 (89%) had experienced 3 or more prior episodes of CDI. At 3 months after the initial FMT, 103 (80%) patients had no recurrence, 26 (20%) patients had 1 or more recurrences managed with 1 (n=21) or 2 (n=2) additional FMTs, and 3 (12%) were transitioned to CDI suppressive therapy. During subsequent long-term follow-up (median 182 weeks), 21 of the 126 patients (17%) who did not transition to suppressive therapy had additional episodes managed with CDI therapy only (n=9), CDI therapy and additional FMT (n=10), or suppressive CDI therapy (n=2). Conclusions: In a real-world setting with long-term follow-up, FMT via freeze-dried capsules was effective for the management of recurrent CDI. Repeated FMT procedures were effective for the management of patients with early failure after initial FMT and with additional episodes during long-term follow-up.