
Two methods were used to study the thermal resistance of Listeria monocytogenes. The D60 degrees C values ranged from 1.3-6.5 min in an open vessel. D72 degrees C varied from 0.06-1.5 s and z from 3.1-6.5 K (38 strains) in capillary tubes. Therefore a conventional pasteurization process of 15 s at 72 degrees C could assure 10-750 decimal reductions, depending on the strain. Six days enrichment, at 4 degrees C in milk prior to incubation at 37 degrees C, did not show any influence on measured heat resistance (4 strains). A significant difference in thermal resistance among strains according to their serotype was noted: strains belonging to serogroup 1 were more heat resistant than those belonging to serogroup 4.
Hot Temperature, Meat, [SDV.IMM] Life Sciences [q-bio]/Immunology, [SDV.BA] Life Sciences [q-bio]/Animal biology, [SDV]Life Sciences [q-bio], [SDV.GEN.GA] Life Sciences [q-bio]/Genetics/Animal genetics, [SDV.BC.IC] Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], [SDV.BBM.BM] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Listeria monocytogenes, [SDV] Life Sciences [q-bio], Milk, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, Environmental Microbiology, Food Microbiology, Animals, Humans, [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Dairy Products, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, [SDV.MP] Life Sciences [q-bio]/Microbiology and Parasitology
Hot Temperature, Meat, [SDV.IMM] Life Sciences [q-bio]/Immunology, [SDV.BA] Life Sciences [q-bio]/Animal biology, [SDV]Life Sciences [q-bio], [SDV.GEN.GA] Life Sciences [q-bio]/Genetics/Animal genetics, [SDV.BC.IC] Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], [SDV.BBM.BM] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Listeria monocytogenes, [SDV] Life Sciences [q-bio], Milk, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, Environmental Microbiology, Food Microbiology, Animals, Humans, [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Dairy Products, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, [SDV.MP] Life Sciences [q-bio]/Microbiology and Parasitology
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