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Could a gut infection trigger food allergies in IBS?

NCT ID NCT06413004

Knowledge-focused Sponsor: Magnus Simrén 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time

Summary

This study investigates whether a gut infection called Brachyspira causes IBS symptoms by making the immune system overreact to certain foods. Researchers will use advanced imaging to identify which foods trigger reactions in the gut. Participants will eliminate those foods for four weeks, then reintroduce them, while their symptoms are tracked. The goal is to understand whether treating the infection or avoiding trigger foods could help manage IBS.

What this could mean

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

Active substance
Elimination and re-introduction of food items identified by CLE or COLAP
What this could lead to
If successful, this could reveal a new cause of IBS symptoms and point toward personalized dietary treatments.
What could go wrong
This is an early exploratory study with no treatment being tested; results may not lead to a clear or broadly applicable therapy.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 200 people

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

Started

Aug 2022

Expected to finish

Dec 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.

Ages

18 to 70 years

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 with IBS diagnosis according to their treating physician (ROME IV). * Association between intake of food and GI symptoms. * Witnessed written informed consent prior to any study procedures. * Patients who are capable to understand the study and the questionnaires, and to comply with the study requirements. Exclusion Criteria: * Patients with relevant concurrent organic GI disease (inflammatory bowel disease, abdominal cancer), or a major disease such as diabetes, uncontrolled thyroid disease, heart disease, kidney disease, liver disease, and active malignant disease (not those that were in remission at least 5 years). * Patients with a history of bowel surgery (not appendectomy or cholecystectomy) that affects GI motility. * Patients with systemic food allergy as evidenced by positive allergy tests (blood, prick test). * Clinical history of severe allergic reactions. * Patients with concurrent major confounding condition(s) based on the clinician's judgement, e.g. DOMINANT psychiatric disorder, vital depression, alcohol or substance abuse in the last 2 year. * Female patients who are pregnant or lactating (females of fertile age are requested to use a safe contraceptive) at the time of inclusion. * Patients who use or used new medications that affect the GI functioning within 1 month before the start of the study.

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Conditions

The condition(s) this trial relates to.

Food Intolerance irritable bowel syndrome

As listed by the trial registrant

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

Food sensitivity Irritable bowel syndrome

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

  • Mag-tarmlab, Dept of Internal Medicine, Sahlgrenska University Hospital

    RECRUITING

    Gothenburg, 413 45, Sweden

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