Clinical trial Recruiting at 1 site Interventional

Identifying genetic factors in Listeriosis

Official title: Genetic Susceptibility to Listeriosis - Listeria-GEN

Run by Institut Pasteur · NCT03357536 · Data updated 2026-11-12

This study is trying to find out if certain genes make some people more likely to get severe Listeriosis, especially in older adults and those with weakened immune systems.

Quick facts

Study typeInterventional
SexAll
Enrollment100 (estimated)
SponsorInstitut Pasteur
Industry-sponsored
Locations1 site (Paris)
StatusRecruiting
StartedNovember 28, 2017
Main results expectedNovember 30, 2027
Study endsNovember 30, 2027
Registry record updatedSeptember 19, 2025
Trial IDNCT03357536 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include individuals with microbiologically documented Listeriosis, particularly those under 40 years old without identified risk factors.

Probably not a fit

Patients with Listeriosis who do not meet the inclusion criteria or those unable to provide informed consent 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 study investigates the genetic susceptibility to Listeriosis, a severe foodborne infection primarily affecting the elderly and immunocompromised individuals. It is part of the ongoing MONALISA project, which has been collecting data since 2009 to analyze risk factors and outcomes associated with Listeriosis. The study aims to identify genetic markers that may explain why some individuals develop severe forms of the disease, including neurolisteriosis, while others do not. By analyzing human biological samples from affected patients and their relatives, the research seeks to enhance treatment and prevention strategies for this rare infection.

Why it matters

Potential benefit: If successful, this study could lead to improved prevention and treatment strategies for patients at risk of severe Listeriosis.

How similar studies have gone: While genetic susceptibility in Listeriosis has not been extensively studied, similar approaches in other infectious diseases have shown promise in identifying risk factors and improving patient outcomes.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria for patients with Listeriosis :

* Microbiologically documented Listeriosis (either a severe form of listeriosis, or an atypical form of listeriosis, or less than 40 years old and without any co-morbidity identified)
* Affiliated or beneficiary of a social security system
* Informed and written consent

Inclusion Criteria for volunteers related to patients with Listeriosis (after identifying a genetic susceptibility in the patient with Listeriosis) :

* defined as father, mother, brother (s), sister (s), child (ren), grandparent (s), uncle (s), aunt (s), cousin (s), nephew (s), niece (s).
* Affiliated or beneficiary of a social security system
* Informed and written consent

Exclusion Criteria for volunteers related to patients with Listeriosis:

* Inability to consent

Where it's running

  • Centre Médical de l'Institut Pasteur
    Paris, France
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.