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Updated: Jan 24, 2026

Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes
Published on: September 19, 2013
Microbe Profile: Listeria monocytogenes: a paradigm among intracellular bacterial pathogens
Javier Pizarro-Cerdá1, Pascale Cossart2
1Yersinia Research Unit, Department of Microbiology, Institut Pasteur - 75015 Paris, France.
Abstract:
Listeria monocytogenes is a food-borne bacterial pathogen that is responsible for listeriosis, a disease characterized by occasional febrile gastroenteritis in immunocompetent individuals, abortions in pregnant women, meningitis in the newborn and fatal bacteraemia in immunocompromised individuals or the elderly. The ability of L. monocytogenes to produce disease is intimately associated with its potential to traverse several human barriers (including the intestinal, placental and blood/brain barriers), to promote its internalization within diverse populations of epithelial cells and to proliferate in the intra-ic environment while escaping host immune responses. L. monocytogenes is often regarded as a paradigm for intracellular parasitism.
Insights
Listeria monocytogenes is a food-borne pathogen causing listeriosis. This bacterium invades host cells and evades immune responses, making it a model for intracellular parasitism.
Area of Science:
- Microbiology
- Pathogen Research
- Infectious Diseases
Background:
- Listeria monocytogenes is a significant food-borne pathogen responsible for listeriosis.
- Listeriosis presents with varied symptoms, including gastroenteritis, abortion, meningitis, and fatal bacteremia, particularly in vulnerable populations.
Observation:
- L. monocytogenes exhibits remarkable ability to breach human physiological barriers.
- The pathogen efficiently enters diverse epithelial cells and replicates intracellularly.
Findings:
- The bacterium's pathogenesis is linked to its capacity for barrier traversal and intracellular proliferation.
- L. monocytogenes effectively evades host immune system responses.
Implications:
- Understanding L. monocytogenes' intracellular lifestyle provides insights into host-pathogen interactions.
- This pathogen serves as a key model organism for studying intracellular bacterial pathogenesis.
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