Listeria monocytogenes in ready-to-eat (RTE) foods: attribution, characterization and monitoring


Book Description

Since the publication of the 2004 risk assessment, outbreaks of illness and resultant deaths due to L. monocytogenes continue to occur across the globe. Continued effort is needed to summarize and critically evaluate the most recent information on L. monocytogenes in RTE foods. New data to improve and further inform the 2004 Risk Assessment is available for nearly every factor considered previously, including new quantitative data on L. monocytogenes contamination of foods. To facilitate this work, an FAO/WHO expert meeting was held by virtual means from 20 October to 6 November 2020 to review and discuss the available data and background documents, and to assess the need to modify and update risk assessment models/tools. This report focuses on the deliberations and conclusions of the expert meeting.




Risk Assessment of Listeria Monocytogenes in Ready-to-eat Foods


Book Description

Cases of listeriosis appear to be predominantly associated with ready-to-eat products. FAO and WHO have undertaken a risk assessment of Listeria monocytogenes in ready-to-eat foods, prepared and reviewed by an international team of scientists. Input was received from several international fora including expert consultations and Codex Alimentarius committee meetings as well as via public and peer review. This interpretative summary provides an overview of how the risk assessment was undertaken and the results. In particular, it provides information relevant to risk managers addressing problems posed by this pathogen in ready-to-eat foods. It includes answers to the specific risk management questions posed by the Codex Committee on Food Hygiene and outlines the issues to be considered when implementing control measures, including the establishment of microbiological criteria.




Risk Assessment of Listeria Monocytogenes in Ready-to-eat Foods


Book Description

Cases of listeriosis appear to be predominantly associated with ready-to-eat products. FAO and WHO have undertaken a risk assessment of Listeria monocytogenes in ready-to-eat foods, prepared and reviewed by an international team of scientists. Input was received from several international fora including expert consultations and Codex Alimentarius committee meetings as well as via public and peer review. This technical report provides complete documentation of the risk assessment, the approaches taken, the data and methodology used, and the results. It also contains four example assessments addressing the risk of listeriosis associated with fresh milk, ice cream, fermented meats and cold-smoked fish. These products were selected to represent typical classes of ready-to-eat products.




Listeria monocytogenes in the Food Processing Environment


Book Description

This Brief focuses on Listeria monocytogenes, from isolation methods and characterization (including whole genome sequencing), to manipulation and control. Listeriosis, a foodborne disease caused by Listeria monocytogenes is a major concern for public health authorities. In addition, addressing issues relating to L. monocytogenes is a major economic burden on industry. Awareness of its ubiquitous nature and understanding its physiology and survival are important aspects of its control in the food processing environment and the reduction of the public health concern.




Foodborne Infections and Intoxications


Book Description

Listeria monocytogenes is an important Gram-positive foodborne pathogen responsible for causing diseases with a high mortality rate in the elderly, pregnant women, neonates, and immunocompromised populations. L. monocytogenes is ubiquitously present in nature and has been isolated from various types of foods. It is especially a challenge in ready-to-eat (RTE) or minimally processed foods that support listerial growth. DNA-based detection and molecular subtyping methods provide important resources for tracking L. monocytogenes contamination throughout the RTE food chain. Combinations of interventions, such as testing and sanitation of food contact surfaces, control of storage temperatures and periods, and use of growth inhibitors in RTE foods that support L. monocytogenes growth are suggested to control L. monocytogenes contamination in the RTE food chain. In addition, a better understanding of the ecology and biology of L. monocytogenes, with a focus on virulence and stress response systems that facilitate transmission through diverse environments encountered by L. monocytogenes, will further facilitate the control of this important foodborne pathogen.