Why Won’t It Leave? Genomic Clues to Listeria monocytogenes Persistence in Food Environments

Listeria monocytogenes is a major foodborne pathogen responsible for listeriosis, a severe infection associated with high hospitalization and mortality rates, particularly among vulnerable groups such as the elderly, immunocompromised individuals, and pregnant women. Despite its relatively low incidence, listeriosis remains a significant public health concern, being the fourth leading cause of death and hospitalization due to zoonotic diseases in the European Union. A major challenge in controlling L. monocytogenes is its ability to persist in food processing environments (FPE), where it can survive for extended periods and act as a continuous source of food contamination. This persistence contributes to recurrent contamination events, food recalls, and substantial economic losses for the food industry.
The PopGenListeria project investigates the genetic basis of persistence and the population dynamics of L. monocytogenes in FPE. Its main objective is to identify genetic determinants associated with adaptation and long-term survival, as well as the driving forces shaping bacterial populations in these environments. The project aims to generate insights that support the development of improved monitoring, prevention, and control strategies for the food industry.

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