Control of Listeria monocytogenes in Cheese Brines: A Literature Review
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Abstract
Listeria monocytogenes (L. mono.) is a top pathogen of concern in the cheese industry. The organism is prevalent in the environment and has been known to inhabit dairy manufacturing facilities, including long-term survival in brine tanks. Along with good hygiene and sanitation practices, validated L. mono. control methods must be employed to ensure extended-use brine tanks do not become reservoirs for Listeria monocytogenes, potentially leading to serious health issues in cheese consumers. Control methods considerations include L. mono. cells in suspension, cells attached to protective biofilms, and effectiveness in the presence of organic matter. This literature review investigated the availability of scientific research on effective control methods for Listeria monocytogenes in cheese brines. Research on L. mono. control in other applicable areas was considered where information related specifically to cheese brine environments was not found. Potential effective control methods were identified, including membrane filtration and oxidizing agents such as peroxyacetic acid and hydrogen peroxide. Further research is needed to fill knowledge gaps related to successful implementation of these controls in cheese brines.