Using fecal microbiota transplantation to treat Clostridioides difficile infections
Official title: Fecal Microbiota Transplantation Versus Vancomycin or Fidaxomicin in Clostridioides Difficile Infection First Episode or First Recurrence: A Randomized Controlled, Open-label, Multicenter Phase III Clinical Trial
Run by Centre Hospitalier Universitaire Vaudois · NCT05266807 · Data updated 2026-11-12
This study is testing if a new treatment using fecal microbiota transplantation can help people with their first Clostridioides difficile infection or its first recurrence feel better and prevent future infections after standard antibiotic treatment.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 100 (estimated) |
| Sponsor | Centre Hospitalier Universitaire Vaudois Academic / other |
| Locations | 8 sites (Basel, Basel and 7 other locations) |
| Status | Recruiting |
| Started | March 15, 2023 |
| Main results expected | April 1, 2027 |
| Study ends | January 31, 2028 |
| Registry record updated | July 10, 2026 |
| Trial ID | NCT05266807 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 18 and older with a first episode of CDI and risk factors for recurrence.
✕Probably not a fit
Patients who have had multiple CDI episodes or those without risk factors for recurrence may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial evaluates the effectiveness of fecal microbiota transplantation (FMT) following standard antibiotic treatment (vancomycin or fidaxomicin) in patients experiencing their first episode or first recurrence of Clostridioides difficile infection (CDI). Participants will receive either the standard treatment alone or the standard treatment followed by FMT using oral capsules. The study aims to determine if FMT can reduce the risk of further CDI recurrences compared to standard antibiotic therapy alone. This approach is based on previous evidence suggesting FMT is effective for patients with multiple recurrences but has not been tested for first episodes or first recurrences.
Why it matters
Potential benefit: If successful, this treatment could significantly reduce the recurrence of Clostridioides difficile infections and improve patient outcomes.
How similar studies have gone: Previous studies have shown that fecal microbiota transplantation is effective for recurrent CDI, but this specific application for first episodes and first recurrences is novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Adults (≥18 years old) at the time of informed consent 2. Informed consent signature 3. Medical record documentation of CDI defined as: a. A first CDI episode associated with risks factors for recurrence, defined as: i. No CDI episode within the last 8 weeks ii. Current combination of CDI signs and symptoms, confirmed by medical record documentation of microbiological evidence of C. difficile toxin and C. difficile in stools shown by a CDI PCR positive test with Ct \< 25 or a toxin A/B EIA positive test and without reasonable evidence of another cause of diarrhea, iii. Presenting at least one of the following risks factors for CDI recurrence: * age \>65 years-old, * hospitalization within the last 3 months, * use of proton pump inhibitors (PPI) within the last 3 months, * Charlson comorbidity index (CCI) \>2, * living in long term facility, * healthcare- associated CDI (see definition in section 7), * severe CDI episode (see definitions in section 6.1.2), * immunocompromised patient (except severely immunocompromised according to definitions in section 7.1), * history of prior CDI episode(s) (more than 8 weeks ago). OR b. A first CDI recurrence, defined as: i. Previous episode of treated and cured CDI within the last 8 weeks confirmed by medical record documentation of a clinical picture of CDI combined with a positive microbiological CDI test performed according to CDI diagnosis ESCMID guidelines ii. Current combination of CDI signs and symptoms, confirmed by medical record documentation of microbiological evidence of C. difficile toxin and C. difficile in stools shown by a CDI PCR positive test with Ct \< 25 or a toxin A/B EIA positive test , and without reasonable evidence of another cause of diarrhea.. 4. No multiple episodes (no more than 2 CDI episodes) within 3 last months. 5. Already taking since less than 10 days or will start a course of antibiotics (vancomycin or fidaxomicin) to control recurrent CDI symptoms at the time of screening. 6. Willing and able to have FMT by capsule Exclusion Criteria: 1. Severe-complicated CDI if at least one of the following signs or symptoms are: * ongoing at time of screening and related to CDI: hypotension, septic shock, elevated serum lactate, ileus, * or were present at any time of the CDI episode and related to CDI: toxic megacolon, bowel perforation, or any fulminant course of disease (i.e. rapid deterioration of the patient. 2. Prior FMT within 6 months of randomization, 3. Prior total colectomy, colostomy, ileostomy, or gastrectomy 4. Metronidazole already given alone for the treatment of the current CDI for more than 3 days, 5. Need for continued non-anti-CDI systemic antibiotics (should be stopped at randomization at the latest), except prophylactic doses of trimethoprim/sulfamethoxazole, 6. Anticipated indication for antibiotics treatment (for a non-CDI reason) in the next 8 weeks except prophylactic doses of trimethoprim/sulfamethoxazole 7. Other causes of chronic or acute diarrhea beyond CDI (chronic diarrhea is defined as loose/watery stools, which occur three or more times within 24 hours and last for 4 or more weeks) 8. Inflammatory bowel disease, 9. Patients with swallowing disorders, Zenker's diverticulum, gastroparesis, or prior small bowel obstruction, 10. Known hypersensitivity to vancomycin or fidaxomicin, 11. Pregnant/lactating women, 12. Estimated patient's life expectancy of less than 10 weeks, 13. Inability to follow protocol study procedures, 14. Inability to give informed consent, 15. Any condition or medications that will put the participant at greater risk from FMT according to the investigator, 16. Severely immunocompromised 17. No response to anti-CDI antibiotic treatment after at least 5 days of treatment (i.e. no diminution of the daily number of stools at BSS 6-7 compared to first day of treatment; or worsening of CDI severity parameters)
Where it's running
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Universitätsspital
Basel, Basel, Switzerland Recruiting -
Inselspital Bern
Bern, Canton of Bern, Switzerland Recruiting -
HFR Fribourg - Hôpital cantonal
Fribourg, Canton of Fribourg, Switzerland Recruiting -
Hirslanden Klinik St Anna
Lucerne, Canton of Lucerne, Switzerland Recruiting -
Kantonsspital St Gallen, HOCH
Sankt Gallen, Canton of St. Gallen, Switzerland Recruiting -
Chuv
Lausanne, Canton of Vaud, Switzerland Recruiting
Show 2 more locations
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Universitätsspital Zürich
Zurich, Canton of Zurich, Switzerland Recruiting -
Institut central des hôpitaux
Sion, Valais, Switzerland Recruiting
Study contacts
- Principal investigator: Benoit Guery — Chuv
- Study coordinator: Benoit Guery, MD
- Email: benoit.guery@chuv.ch
- Phone: +41213141643
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Diet and counseling to see how meals affect gut health after CDI
We’re testing whether different meal plans and health counseling can influence the gut microbiome and reduce chances of CDI coming back in adults who are being treated for CDI.
-
Lyophilized fecal microbiota transplant for adults with active ulcerative colitis
This trial will test whether a dried (lyophilized) fecal microbiota transplant helps adults with active ulcerative colitis when added to their current treatment or started alongside a new advanced medication.
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How antibiotics versus fecal transplants affect recovery from C. difficile infection
This project will see how antibiotics and fecal microbiota transplant (FMT) affect adults with C. difficile infection by tracking recovery and biological changes over time.
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Preventing recurrent C. difficile infection with the AZD5148 antibody
This will try a single dose of the antibody AZD5148 versus placebo to see if it prevents repeat C. difficile infections in adults being treated for a current infection.
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Preventing C. difficile recurrence with short-course oral vancomycin during later antibiotics
This trial tests whether taking short-course oral vancomycin while you need systemic antibiotics can prevent a recurrence of C. difficile in adults recently treated for CDI.
-
UDCA added to standard therapy to prevent C. diff recurrence
This study tests whether taking ursodeoxycholic acid alongside standard antibiotics can reduce recurrence of C. difficile colitis in adults at risk.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.