Clinical Research Directory

VE303 for Prevention of Recurrent Clostridioides Difficile Infection

The overall objective of the RESTORATiVE303 study is to evaluate the safety and the Clostridioides difficile infection (CDI) recurrence rate at Week 8 in participants who receive a 14-day course of VE303 or matching placebo. The objectives and endpoints are identical for Stage 1 (recurrent CDI) and Stage 2 (high-risk primary CDI).

Prevention of Recurrent C. Difficile Infection Study With AZD5148 Monoclonal Antibody

The purpose of this study is to evaluate the efficacy and safety of AZD5148 for prevention of recurrence of Clostridioides difficile infection in Individuals 18 years of age and above.

Evaluation of EXL01, a New Live Biotherapeutic Product to Prevent Recurrence of Clostridioides Difficile Infection in High-risk Patients

Clostridioides difficile infection (CDI) is the leading cause of nosocomial diarrhea in Europe, with over 120,000 cases and almost 3,700 deaths per year. This infection is characterized by a high risk of recurrence after cure, ranging from almost 20% after a first episode to over 60% after 2 recurrences, or in the case of specific risk factors. Currently, first-line treatment of CDI is based on oral antibiotics such as fidaxomicin or vancomycin. These antibiotic treatments, which are effective in 89% and 86% of first-episode cases respectively, do not correct the microbiological imbalance underlying the onset of CDI and may, on the contrary, encourage recurrence by contributing to the maintenance of a deleterious change in the microbiota (dysbiosis) through the elimination of bacteria other than C. difficile, due to their spectrum of activity. In a number of patients, this ecological imbalance can no longer be restored after antibiotic treatment, leading to multiple recurrences of CDI. In this context, fecal microbiota transplantation (FMT) has been validated for over 10 years for the prevention of recurrence in multi-recurrent CDI. The principle of FMT is based on the use of a pharmaceutical preparation made from the stool of a healthy donor, administered within the digestive tract of a patient for therapeutic purposes. Currently, in the case of multiple recurrences, it is the recommended first-line treatment (from 2 recurrences) and the most effective, with a clinical efficacy preventing recurrence of CDI in 69% to 89% of cases at 8 weeks post-treatment, with a good safety profile. Among the microbial factors promoting CDI, the loss of the bacterial species Faecalibacterium prausnitzii constitutes a specific therapeutic target. F. prausnitzii is a commensal bacterium of the human gut, making up nearly 5% of the fecal microbiota, and has been shown to be associated with an individual's state of health. A drop in its relative abundance is associated with an increased risk of numerous diseases, such as Crohn's disease and colorectal cancer. In CDI, F prausnitzii is greatly diminished. Moreover, low abundance of F. prausnitzii is predictive of C. difficile recurrence. Its abundance in stools is increased after FMT and is also predictive of response to treatment. From a pathophysiological point of view, one of the preventive effects of F. prausnitzii on recurrence would be mediated by its ability to hydrolyze the bile acids involved in the germination of C. difficile spores. The aim of this Phase I/II trial is to assess the efficacy and safety of oral administration of EXL01, a single isolated unmodified strain of F. prausnitzii, in preventing CDI recurrence in high-risk patients at W8. The study will be conducted in 2 parts. The phase I (Part A) is planned to include 6 patients. The phase II (Part B) will include 50 patients in two arms (25 patients respectively in the placebo and EXL01 arm).

Xylitol Use for Decolonization of C. Difficile in Patients With IBD

This is a randomized, placebo-controlled, dose-ranging study to assess the safety and efficacy of xylitol as an oral therapeutic for decolonization of C. difficile in IBD patients. A total of 99 patients who meet eligibility criteria will be randomized 1:1:1 to one of two xylitol doses or placebo arm. All arms will receive an identical capsule dosing for four weeks. Microbiome assessment and C. difficile testing will be performed at baseline, week 4, 8, 26, and 52.

Fecal Microbiota Transplantation in an Expanded Ulcerative Colitis Population

This is a multi-centre, randomised controlled trial comparing fecal microbiota transplantation to placebo in an expanded ulcerative colitis population: a feasibility study (FRONTIER-UC) to determine whether a full-scale randomized controlled trial (RCT) to investigate fecal microbiota transplantation (FMT) in ulcerative colitis (UC) is feasible.

LMN-201 for Prevention of C. Difficile Infection Recurrence

This is a multisite study to evaluate the safety, tolerability, and efficacy of LMN-201 in participants recently diagnosed with CDI who are scheduled to receive or are receiving SOC antibiotic therapy against C. difficile.

Clostridioides Difficile: Understanding Responses and Treatment Effects

The goal of this observational study is to learn how different treatments for Clostridioides difficile infection (CDI) work, and which biological mechanisms are involved in recovery. The study will compare standard antibiotic treatment and fecal microbiota transplantation (FMT). The main questions it aims to answer are: * How do antibiotic treatment and FMT affect treatment outcome in CDI? * How does the gut microbiota change during and after treatment? * Which microbial and metabolic factors are associated with recovery or treatment failure? * How does treatment affect the intestinal barrier, immune response, and patient-reported quality of life? Participants with CDI will receive treatment as part of routine clinical care, either antibiotics or FMT. Researchers will follow participants over time and collect biological samples to study treatment effects. Participants will: * Provide stool samples during the acute infection and during follow-up * Have treatment outcomes assessed at 2 and 8 weeks * Be followed for up to 5 years to study long-term effects * Provide blood and urine samples during follow-up * Provide nasal samples to study potential microbiota changes at distant body sites * Complete questionnaires on symptoms and health-related quality of life * In a subgroup, undergo repeated sigmoid biopsies to study intestinal mucosal healing The results are expected to increase understanding of how FMT and antibiotics lead to recovery in CDI and may support improved and more targeted future treatments.

Pilot Trial of Xylitol for C. Difficile De-Colonization in Patients With Inflammatory Bowel Disease

This 3+3 dose escalation pilot trial will assess the safety and efficacy of xylitol as an oral therapeutic for decolonization of C. difficile in the Inflammatory Bowel Disease (IBD) patient population.

Use of Fidaxomicin Compared to Vancomycin for Decolonization of C. Difficile in Patients With Inflammatory Bowel Disease

This is a randomized, double-blind study to assess the safety and efficacy of fidaxomicin compared to vancomycin for decolonization of C. difficile in IBD patients. A total of 60 patients who meet eligibility criteria will be randomized 1:1 to either the fidaxomicin or vancomycin arm. The vancomycin arm will receive a dose of 125 mg PO q 6 hours for 10 days. The fidaxomicin arm will receive 200 mg PO BID for 10 days. In order to ensure blinding, both antibiotics will be concealed in opaque 00 capsule shells. In addition, those in the fidaxomicin arm will receive 2 placebo capsules so that all participants will receive 4 capsules daily for 10 days. Microbiome assessment and C. difficile testing will be performed at baseline, day 5, day 10, and weeks 4, 8, and 26.

Prevention of Recurrence of Clostridioides Difficile Colitis With Ursodeoxycholic Acid (UCDA) as a Supplement to Standard Therapy

The goal of this clinical trial is to determine whether Ursodeoxycholic Acid (UDCA) can help prevent recurrence of Clostridioides difficile (C. diff) colitis when used along with standard antibiotic treatment. C. diff colitis is a serious infection that can return after treatment, and researchers want to see if UDCA can reduce this risk. This study aims to answer three main questions. First, can UDCA help prevent C. diff from returning after standard treatment? Second, does adding UDCA to treatment lower the need for repeated antibiotic use? Third, is UDCA safe and well-tolerated for people with C. diff? Participants in the study will be adults diagnosed with C. diff colitis who have risk factors for recurrence. Each participant will receive standard antibiotic treatment, which may include Vancomycin, Fidaxomicin, or Metronidazole. In addition to their antibiotic therapy, participants will take UDCA at a dose of 500 mg three times a day for up to eight weeks. If a participant's stool test shows they are C. diff negative at four weeks, they will stop taking UDCA early. Researchers will monitor participants throughout the study. Stool samples will be tested at the beginning, after four weeks, and at the end of the study. If a participant develops diarrhea, a stool test will check for C. diff. If C. diff is negative, the UDCA dose will be reduced. Weekly phone calls will be made to check for side effects and ensure participants are following the treatment plan. C. diff colitis is a common and serious infection, with up to 46 percent of high-risk patients experiencing recurrence. Current treatments rely on antibiotics, which can disrupt gut bacteria and increase the risk of reinfection. UDCA is a naturally occurring bile acid that may help prevent C. diff from growing, reducing the need for repeated antibiotic treatment. If successful, this study could introduce a new way to prevent C. diff from coming back, helping patients recover more effectively while reducing antibiotic use. Eligible participants must be at least 18 years old, have a positive C. diff test, and be receiving standard antibiotic treatment for C. diff. People who have severe or life-threatening C. diff colitis, a life expectancy of less than six months, serious liver disease, or are pregnant or breastfeeding will not be eligible to participate. UDCA is FDA-approved and has been used safely for decades in liver diseases and gallstone treatment. Some people may experience mild side effects, such as diarrhea, nausea, or stomach discomfort. Participants will be closely monitored for safety throughout the study. This trial will take place within the Froedtert and Medical College of Wisconsin healthcare system in Milwaukee, Wisconsin.

Secondary Prevention of Clostridioides Difficile Using Vancomycin

Re-exposure to systemic antibiotics (i.e., antibiotics absorbed into the bloodstream) is common after a Clostridioides difficile infection (CDI) and is the strongest risk factor for a recurrent episode. Oral vancomycin to prevent a recurrence during antibiotic re-exposure may reduce this risk but the data supporting this practice are limited. The aim of this trial is: 1\) Does oral vancomycin prophylaxis prevent CDI recurrences in patients with recent CDI (within 120 days) and who are re-exposed to systemic antibiotics? The trial will compare oral vancomycin to placebo. Participants will: * Take the study drug (either vancomycin or placebo) twice daily for the duration of systemic antibiotics plus once daily for 7 days after completion of systemic antibiotics. * Attend an in-person follow-up at day 56 * Respond to weekly electronic questionnaires

Fecal Microbiota Transplantation in Clostridioides Difficile Infection First Episode and First Recurrence

The clinical trial aims to evaluate the efficacy of fecal microbiota transplantation (FMT) after standard of care treatment (either vancomycin or fidaxomicin) vs the pragmatic use of standard of care treatment (either vancomycin or fidaxomicin) in severe and non-severe first episode and first recurrence of Clostridioides difficile infection (CDI). Experimental arm: antibiotic treatment (vancomycin or fidaxomicin as initially prescribed per SoC continued for 10 days) followed by FMT by oral capsules (one FMT, i.e. 20 FMT capsules given on 2 consecutive days, and followed by a 2nd FMT in severe CDI). Control Arm: vancomycin or fidaxomicin as initially prescribed per SoC continued for 10 days.

STOP-CDI: Efficacy of Fecal Microbiota Transplantation vs Fidaxomicin vs Vancomycin in Treating and Preventing Relapse of Clostridioides Difficile Infection

The STOP-CDI study is a multicenter, randomized, open-label, three-arm clinical trial comparing the efficacy of fecal microbiota transplantation (FMT) preceded by vancomycin, fidaxomicin monotherapy, and standard-of-care vancomycin in preventing recurrence of Clostridioides difficile infection (CDI) in high-risk adult patients. CDI is a common healthcare-associated infection with rising incidence and high recurrence rates, particularly in elderly and immunocompromised individuals. While current guidelines recommend fidaxomicin as first-line therapy, its availability and reimbursement remain limited in some healthcare systems. FMT, although effective, is not widely implemented as first-line treatment. This study addresses the need for comparative, real-world data to inform treatment decisions for patients at high risk of severe or recurrent CDI. Eligible participants include adults aged ≥65 years or younger patients with specific risk factors such as multiple comorbidities, prior CDI episodes, recent hospitalization, use of non-CDI antibiotics, or PPI therapy. Participants will be randomized in a 2:1:1 ratio to one of three treatment arms: (1) vancomycin plus FMT, (2) fidaxomicin, or (3) vancomycin alone. FMT is administered via capsules or, if necessary, alternative endoscopic routes. The primary endpoint is CDI recurrence within 12 weeks following the initial treatment. Secondary endpoints include clinical cure, safety, and global cure. Exploratory analyses will assess microbiome changes and potential genomic predictors of response. A total of 424 participants will be enrolled across 10 clinical sites in Poland. The study aims to provide robust, comparative evidence to support clinical guidelines and improve outcomes for patients with CDI, particularly in healthcare systems with limited access to novel therapies.

A Flexible Clinical Trial to Test if Freeze-dried Fecal Microbiota Therapy Helps Treat Diarrhea-predominant Irritable Bowel Syndrome or Prevent Recurring C. Difficile Infections.

The goal of this clinical trial is to learn if oral lyophilized fecal microbiota therapy (ORAL-LYO-FMT) helps treat diarrhea-predominant irritable bowel syndrome (IBS-D) and prevent the recurrence of Clostridioides difficile infection (rCDI). The main questions it aims to answer are: * Does ORAL-LYO-FMT reduce IBS symptoms? * Does it prevent rCDI after treatment? * What side effects or safety concerns might occur? Researchers will compare ORAL-LYO-FMT to a placebo (a look-alike capsule with no active treatment) to see how well it works. Participants will: * Be randomly assigned to take ORAL-LYO-FMT or placebo for up to 7 weeks * Take capsules three times per week (Monday, Wednesday, Friday) * Complete health questionnaires and have follow-up visits by phone or in person for up to 6 months The trial also looks at changes in quality of life, mood, and new or ongoing medical conditions over time.

FMT in Initial CDI

The study explores fecal microbiota transfer via retention enema after the first clostridioides difficile episode.

Evaluation of GeoHAI Implementation

Geographic Information Systems (GIS) and spatial analysis have become important tools in public health informatics but have rarely been applied to the hospital setting. In this study we apply these tools to address the challenge of Hospital Acquired Infections (HAIs) by building, implementing, and evaluating a new computer application which incorporates mapping and geographic data to assist hospital epidemiologists in identifying HAI clusters and assessing transmission risk. We expect that incorporation of geographic information into the workflow of hospital epidemiologists will have a profound effect on our understanding of disease transmission and HAI risk factors in the hospital setting, radically altering the workflow and speed of response of infection preventionists and improving their ability to prevent HAIs.

Prevention of Clostridium Difficile Infections Using Lactobacillus Plantarum 299v Strain in Nephrology and Transplantation Department

The aim of this study was to analyze whether the use of the LP299v strain reduces the risk of Clostridium difficile infection (CDI) among patients receiving antibiotics and hospitalized in the nephrology and transplantation ward. Adutt patients from risk group (receiving immunosuppressive drugs and treated with antibiotics) were enrolled into study. Patients who meet the above criteria for inclusion in the study will be assigned to one of two groups. Patients in group I (study) will receive a probiotic containing the Lactobacillus plantarum 299v strain of bacteria as part of the prophylaxis of Clostridioides difficile infection. The daily dose is 1 capsule containing approximately 10x109 colony-forming units of live bacteria taken orally with a meal. Patients in group II (control) will receive a placebo. The duration of probiotic or placebo use will be 3 months. Assignment to groups I and II will be random. The number of patients in each group will be 150. Participants will be divided into two groups. First group will receive one capsule of Lactobacillus plantarum 299v (LP299v) orally per a day. Second group will receive placebo. The observation period will last 3 months. The evaluation will consist of an interview, physical examination and laboratory tests.

CMTS0929 for Clostridioides Difficile Infection

This is a prospective, open-label, single-arm study to explore the safety and the efficacy of CMTS0929 for patients with Clostridioides difficile infection (CDI).

Study of Clostridioides Difficile in Infants

Clostridioides difficile infection (CDI) poses an increasing threat to infant and young child health, with detection rates rising annually. This retrospective study aims to explore the epidemiological characteristics, clinical manifestations, and potential biomarkers of CDI in children aged 0-2 years by examining three cohorts: (1) infants diagnosed with CDI, (2) asymptomatic carriers of C. difficile, and (3) healthy controls. Fecal samples from each group will undergo metagenomic sequencing and metabolomic profiling, coupled with questionnaire-based surveys for risk factor assessment. The findings are anticipated to identify key high-risk factors, elucidate the pathogenic mechanisms underlying infant CDI, and support the development of early diagnostic tools and preventive strategies.

Alanyl-glutamine Supplementation for C. Difficile Treatment (ACT)

This is a randomized, double-blind, placebo-controlled trial to determine the optimal dose and safety of oral alanyl-glutamine between 4, 24, and 44 g doses administered for 10 days with standard therapy among first time incident cases of uncomplicated C. difficile infection (CDI) in hospitalized, or outpatient, persons aged 18 or older. The investigators hypothesis is that alanyl-glutamine supplementation will decrease recurrence and mortality from CDI and these outcomes will be associated with improvement of inflammatory markers and restoration of intestinal microbiota function.

Lyophilized Fecal Microbiome Transfer vs. Vancomycin Monotherapy for Primary Clostridioides Difficile Infection

The goal of this clinical trial is to test whether lyophilized fecal microbime transfer - a dried extract of bacteria from the stool of healthy donors - is better than antibiotic therapy only for treating primary clostridioides difficile infection (CDI) in adult participants. The main question it aims to answer is whether lyophilized fecal microbiome transfer lowers the number of episodes of CDI compared to antibiotic therapy. Participants will be assigned to one of two groups: * In the intervention group participants will be given vancomycin by mouth for five days followed by 5 days of capsules of lyophilized fecal microbiome to swallow, up until day 10. * In the control group participants will be given vancomycin by mouth for ten days. * All participants will be asked to arrive for two follow-up visits and to fill out questionnaires. In addition, all participants will be asked to give stool samples before antibiotic therapy and on the two follow-up visits. Researchers will compare the intervention group and the control group to see if there is a difference in symptoms degree after ten days and in recurrence of the infection after two months. They will also compare side effects, the total use of antibiotics and the change in the composition of bacteria in the stool, namely the presence of bacteria that are resistant to many drugs.

Rescue Fecal Microbiota Transplantation for National Refractory Intestinal Infections

A national data registry of patients receiving the rescue fecal microbiota transplantation for the refractory intestinal infections from the China Microbiota Transplantation System was designed to assess the short-term and long-term safety and efficacy.

Washed Microbiota Transplantation for Clostridioides Difficile Infection

This is a real-world study to explore the safety and the efficacy of washed microbiota transplantation （WMT） for patients with Clostridioides Difficile Infection （CDI）.