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Updated: Jun 22, 2026

Measuring Bacterial Load and Immune Responses in Mice Infected with Listeria monocytogenes
Published on: August 9, 2011
Evaluation of the Antimicrobial Effect of Bioprotective Lactic Acid Bacteria Cultures Against Listeria monocytogenes
Javier Sánchez-Martín1, Salud María Serrano-Heredia1, Arícia Possas1
1Departamento de Ciencia y Tecnología de los Alimentos, UIC Zoonosis y Enfermedades 10 Emergentes (ENZOEM), Campus de Excelencia Internacional en Agroalimentación (CeiA3), 11 Universidad de Córdoba, Campus Rabanales, Edificio Darwin-Anexo, E-14071 Córdoba, Spain.
Abstract:
The growing demand for Ready-to-Eat (RTE) fish products increases the need for effective safety measures against Listeria monocytogenes, a pathogen associated with high fatality rates. This study evaluated the bioprotective potential of lactic acid bacteria (LAB) strains, including probiotic ones, against L. monocytogenes in cold-smoked rainbow trout. Two LAB cocktails were tested: a commercial mix (LC-LL) and a vegetable-derived mix (LAB2-LP15). LC-LL effectively inhibited L. monocytogenes at both static (5 °C) and dynamic (4-20 °C) conditions by the inhibitory effect of the bacteriocin leucocin (≈4 log unit growth inhibition). In contrast, LAB2-LP15 was effective only at 5 °C (≈2 log unit growth inhibition), maintaining the best sensory characteristics. These findings support the use of LAB as natural bioprotective agents in RTE fish, combining food safety and sensory preservation.
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