NCT03357536

Genetic Susceptibility to Listeriosis

Genetic Susceptibility to Listeriosis - Listeria-GEN

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 100 (estimated)
• Sponsor: Institut Pasteur · Industry
• Sex: All
• Age: —
• Healthy volunteers: Accepted

Summary

Listeriosis is a rare, severe foodborne infection, responsible for severe invasive infections. It occurs in the great majority of cases in elderly patients and / or patients with comorbidities, with a deficit of innate or cellular immunity. Pregnancy is also a risk factor. The Multicentric Observational NAtional Analysis of Listeriosis and Listeria (MONALISA) is an ongoing national case-control prospective study on listeriosis implemented since 2009 to study risk and prognosis factors for listeriosis. In this cohort, which enrolled 902 patients on 1 August 2014, 7% of patients with neurolisteriosis are under 40 years of age and have no identified risk factor. Genetic susceptibility is suspected in these patients. Genetic susceptibility could also explain the inconstant development of a neurolisteriosis or fetal infection, as well as the particular severity of some infections (death, foetal loss, neurological sequelae). The aim of the study is to identify genetic susceptibility to Listeriosis.

Detailed description

Listeriosis is a rare, severe foodborne infection caused by the bacterium Listeria monocytogenes (Lm), responsible for severe invasive infections. It occurs in the great majority of cases in elderly patients and / or patients with comorbidities, with a deficit of innate or cellular immunity. Pregnancy is also a risk factor. The Multicentric Observational NAtional Analysis of Listeriosis and Listeria (MONALISA) is an ongoing national case-control prospective study on listeriosis implemented since 2009 to study risk and prognosis factors for listeriosis. In this cohort, which enrolled 902 patients on 1 August 2014, 7% of patients with neurolisteriosis are under 40 years of age and have no identified risk factor. Genetic susceptibility is suspected in these patients. Genetic susceptibility could also explain the inconstant development of a neurolisteriosis or fetal infection, as well as the particular severity of some infections (death, foetal loss, neurological sequelae). The analysis of the genetically transmitted vulnerability of Lm has not yet been studied, because of the lack of accessibility to prospective cohorts (and their DNA) for this rare and severe infection. The aim of the study is to identify genetic susceptibility to Listeriosis that will optimize the patient care in terms of treatment and prevention.

Conditions

• Listeriosis

Interventions

Type	Name	Description
PROCEDURE	Human biological samples	* Blood sample * Skin biopsy * Saliva

Timeline

• Start date: 2017-11-28
• Primary completion: 2027-11-30
• Completion: 2027-11-30
• First posted: 2017-11-30
• Last updated: 2025-09-19

Locations

1 site across 1 country: France