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C. diff mystery: new study aims to unlock why infections keep coming back

NCT ID NCT06030245

Knowledge-focused Sponsor: Fondation Hôpital Saint-Joseph Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study follows 100 hospitalized patients with Clostridioides difficile infection to track how quickly the bacteria clears from the gut during and after standard antibiotic treatment. Researchers will also analyze gut bacteria and immune responses in stool samples to identify factors linked to recurrence. The goal is to improve prevention and treatment strategies for this often-recurring infection.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this research could identify factors that predict or prevent C. diff recurrence, leading to improved treatment guidelines and reduced relapse rates.
What could go wrong
This is an observational study, not a treatment trial, so it won't directly test a new therapy. Results may not lead to immediate changes in patient care.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2023

Expected to finish

Jan 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients hospitalized in a department of Hôpital Paris Saint-Joseph with microbiologically documented Clostridioides difficile infection or microbiologically documented recurrence of Clostridioides difficile infection, for whom treatment of Clostridioides difficile infection is to be initiated.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients over 18 years of age * Patients hospitalized in a department of GH Paris Saint-Joseph with a microbiologically documented Clostridioides difficile infection or a microbiologically documented Clostridioides difficile recurrence. * Patient to be treated for Clostridioides difficile infection * French-speaking patient * Patients who do not object to their participation in the study Exclusion Criteria: * Patients under guardianship or curatorship * Patient deprived of liberty * Patient under court protection * Pregnant or breast-feeding patient

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Conditions

The condition(s) this trial relates to.

Clostridium difficile colitis Clostridium infectious disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Clostridium difficile infections

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Fondation Hôpital Saint-Joseph

    RECRUITING

    Paris, 75014, France

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