Listeria monocytogenes faecal carriage is common and depends on the gut microbiota

Lukas Hafner (1) , Maxime Pichon (2, 3) , Christophe Burucoa (2, 3) , Sophie H. A. Nusser (1) , Alexandra Moura (1, 4, 5) , Marc Garcia-Garcera (6) , Marc Lecuit (1, 4, 5, 7, 8)

1 Biologie des Infections - Biology of Infection
2 CHU de Poitiers - Centre hospitalier universitaire de Poitiers = Poitiers University Hospital
3 PHAR [Poitiers] - Pharmacologie des anti-infectieux
4 CNR - Centre National de Référence Listeria - National Reference Center Listeria
5 CC-OMS / WHO-CC - Centre collaborateur de l'OMS Listeria / WHO Collaborating Centre Listeria
6 UNIL - Université de Lausanne = University of Lausanne
7 Service des Maladies infectieuses et tropicales [CHU Necker]
8 Imagine - U1163 - Imagine - Institut des maladies génétiques (IHU)

Listeria genus comprises two pathogenic species, L. monocytogenes ( Lm ) and L. ivanovii , and non-pathogenic species. All can thrive as saprophytes, whereas only pathogenic species cause systemic infections. Identifying Listeria species’ respective biotopes is critical to understand the ecological contribution of Listeria virulence. In order to investigate the prevalence and abundance of Listeria species in various sources, we retrieved and analyzed 16S rRNA datasets from MG-RAST metagenomic database. 26% of datasets contain Listeria sensu stricto sequences, and Lm is the most prevalent species, most abundant in soil and host-associated environments, including 5% of human stools. Lm is also detected in 10% of human stool samples from an independent cohort of 900 healthy asymptomatic donors. A specific microbiota signature is associated with Lm faecal carriage, both in humans and experimentally inoculated mice, in which it precedes Lm faecal carriage. These results indicate that Lm faecal carriage is common and depends on the gut microbiota, and suggest that Lm faecal carriage is a crucial yet overlooked consequence of its virulence.

Domaines: Sciences du Vivant [q-bio]

Lukas Hafner, Maxime Pichon, Christophe Burucoa, Sophie H. A. Nusser, Alexandra Moura, et al.. Listeria monocytogenes faecal carriage is common and depends on the gut microbiota. Nature Communications, 2021, 12 (1), pp.6826. ⟨10.1038/s41467-021-27069-y⟩. ⟨pasteur-03457267⟩