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Listeria monocytogenes in Food Safety
Research Guide
What is Listeria monocytogenes in Food Safety?
Listeria monocytogenes in food safety refers to the study of the gram-positive bacterium Listeria monocytogenes as a ubiquitous intracellular foodborne pathogen that causes listeriosis, with significant implications for contamination control, virulence mechanisms, and outbreak prevention in food production.
Research on Listeria monocytogenes encompasses its pathogenesis, virulence determinants, and food safety implications, including bacterial contamination of fresh produce and epidemiology of foodborne outbreaks. Farber and Peterkin (1991) in "Listeria monocytogenes, a food-borne pathogen" describe it as causing listeriosis with a mortality rate of about 24%, primarily affecting pregnant women, newborns, and immunocompromised individuals. The field includes 51,021 works, reflecting extensive investigation into microbial inactivation methods and molecular pathogenicity.
Topic Hierarchy
Research Sub-Topics
Listeria monocytogenes Virulence Determinants
Researchers characterize molecular factors like internalins, listeriolysin O, and ActA enabling intracellular survival, cell-to-cell spread, and host immune evasion. Genetic and proteomic studies identify novel virulence genes.
Listeria Contamination in Fresh Produce
Studies trace survival, internalization, and biofilm formation of Listeria on fruits, vegetables, and ready-to-eat produce, including farm-to-fork risk assessment. Outbreak analyses inform irrigation and harvesting controls.
Epidemiology of Listeria Foodborne Outbreaks
Epidemiological research uses pulsed-field gel electrophoresis (PFGE) and whole-genome sequencing for outbreak source attribution and strain tracking. Case-control studies identify risk factors and incidence trends.
Microbial Inactivation Methods for Listeria
Investigators test interventions like UV radiation, high-pressure processing, and natural antimicrobials for inactivating Listeria in foods while preserving quality. Thermal resistance and sublethal injury are modeled.
Listeria monocytogenes Comparative Genomics
Genomic studies compare lineages, hypervirulent clones, and stress adaptation genes across food and clinical isolates. Pangenome analyses reveal evolution and persistence factors.
Why It Matters
Listeria monocytogenes poses a severe threat in food safety due to its ability to contaminate ready-to-eat foods and fresh produce, leading to outbreaks of listeriosis with high mortality. Farber and Peterkin (1991) in "Listeria monocytogenes, a food-borne pathogen" report a 24% mortality rate, mainly among vulnerable groups like pregnant women and neonates, emphasizing the need for stringent controls in food processing. Vázquez-Boland et al. (2001) in "Listeria Pathogenesis and Molecular Virulence Determinants" detail how intracellular parasitism enables survival in host cells, complicating inactivation; for example, the pathogen's persistence in refrigerated foods has driven regulatory standards like those from the FDA for microbial testing in dairy and deli meats. Glaser et al. (2001) in "Comparative Genomics of Listeria Species" identified genomic differences with nonpathogenic Listeria innocua, aiding targeted interventions such as UV radiation for produce decontamination, directly impacting industry practices to reduce contamination risks.
Reading Guide
Where to Start
"Listeria monocytogenes, a food-borne pathogen" by Farber and Peterkin (1991) provides an accessible introduction to the bacterium's role in foodborne disease, its clinical impact, and basic food safety concerns, making it ideal for newcomers.
Key Papers Explained
Farber and Peterkin (1991) in "Listeria monocytogenes, a food-borne pathogen" establishes the pathogen's foodborne nature and 24% mortality. Vázquez-Boland et al. (2001) in "Listeria Pathogenesis and Molecular Virulence Determinants" builds on this by detailing molecular mechanisms of intracellular infection. Glaser et al. (2001) in "Comparative Genomics of Listeria Species" extends these insights through genome sequencing (2,944,528 bp for L. monocytogenes), identifying virulence genes absent in nonpathogenic relatives.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research focuses on virulence determinants and inactivation methods for fresh produce contamination, as per the cluster description. No recent preprints or news available; frontiers involve applying genomic data to outbreak epidemiology and UV-based microbial controls.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Diarrheagenic<i>Escherichia coli</i> | 1998 | Clinical Microbiology ... | 5.0K | ✓ |
| 2 | Modeling of the Bacterial Growth Curve | 1990 | Applied and Environmen... | 4.1K | ✓ |
| 3 | Hemorrhagic Colitis Associated with a Rare<i>Escherichia coli<... | 1983 | New England Journal of... | 2.6K | ✕ |
| 4 | <i>Klebsiella</i>spp. as Nosocomial Pathogens: Epidemiology, T... | 1998 | Clinical Microbiology ... | 2.6K | ✓ |
| 5 | A dynamic approach to predicting bacterial growth in food | 1994 | International Journal ... | 2.5K | ✕ |
| 6 | Listeria monocytogenes, a food-borne pathogen | 1991 | Microbiological Reviews | 2.4K | ✓ |
| 7 | <i>Listeria</i>Pathogenesis and Molecular Virulence Determinants | 2001 | Clinical Microbiology ... | 2.1K | ✓ |
| 8 | Human aflatoxicosis in developing countries: a review of toxic... | 2004 | American Journal of Cl... | 1.8K | ✓ |
| 9 | Standardization of Pulsed-Field Gel Electrophoresis Protocols ... | 2006 | Foodborne Pathogens an... | 1.6K | ✕ |
| 10 | Comparative Genomics of <i>Listeria</i> Species | 2001 | Science | 1.5K | ✕ |
Frequently Asked Questions
What is the mortality rate of listeriosis caused by Listeria monocytogenes?
Listeriosis from Listeria monocytogenes has a mortality rate of about 24%. This rate applies mainly to vulnerable populations including pregnant women, newborns, the elderly, and immunocompromised individuals. Farber and Peterkin (1991) documented this in "Listeria monocytogenes, a food-borne pathogen".
How does Listeria monocytogenes cause foodborne illness?
Listeria monocytogenes acts as an intracellular pathogen, invading host cells via specific virulence determinants. It survives and multiplies within cells, leading to systemic infection. Vázquez-Boland et al. (2001) explained these mechanisms in "Listeria Pathogenesis and Molecular Virulence Determinants".
What are key virulence determinants of Listeria monocytogenes?
Virulence determinants include proteins enabling host cell invasion, intracellular survival, and cell-to-cell spread. These molecular factors underpin its pathogenicity as a foodborne agent. Vázquez-Boland et al. (2001) reviewed them in "Listeria Pathogenesis and Molecular Virulence Determinants".
What food safety implications arise from Listeria monocytogenes contamination?
Contamination occurs in fresh produce and ready-to-eat foods, prompting microbial inactivation methods like UV radiation. Epidemiology tracks outbreaks to inform prevention. Farber and Peterkin (1991) highlighted its role in foodborne disease in "Listeria monocytogenes, a food-borne pathogen".
How do genomes of Listeria species inform food safety?
Comparative genomics reveals pathogenicity islands absent in nonpathogenic species like L. innocua. The L. monocytogenes genome spans 2,944,528 base pairs. Glaser et al. (2001) detailed this in "Comparative Genomics of Listeria Species".
Open Research Questions
- ? What specific genomic islands in Listeria monocytogenes enable intracellular parasitism compared to L. innocua?
- ? How effective are current microbial inactivation methods like UV radiation against Listeria in fresh produce?
- ? Which virulence determinants contribute most to outbreak severity in immunocompromised populations?
- ? What epidemiological patterns predict Listeria monocytogenes contamination in ready-to-eat foods?
Recent Trends
The field of Listeria monocytogenes in food safety includes 51,021 works, with sustained focus on pathogenesis and fresh produce contamination.
Key papers like Farber and Peterkin , Vázquez-Boland et al. (2001), and Glaser et al. (2001) remain highly cited (2405, 2140, and 1497 citations), indicating stable foundational research without noted growth rates or recent preprints.
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