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Antimicrobial Activity of Oregano Essential Oil Incorporated in Sodium Alginate Edible Films: Control of Listeria monocytogenes and Spoilage in Ham Slices Treated with High Pressure Processing

1
Institute of Technology of Agricultural Products, Hellenic Agricultural Organization-DEMETER, Lycovrissi, 14123 Attica, Greece
2
Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of Athens, 11855 Athens, Greece
3
Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, 11855 Athens, Greece
*
Author to whom correspondence should be addressed.
Materials 2019, 12(22), 3726; https://doi.org/10.3390/ma12223726
Received: 11 October 2019 / Revised: 29 October 2019 / Accepted: 7 November 2019 / Published: 12 November 2019
(This article belongs to the Special Issue Antimicrobial Materials: Application in Food Processing and Storage)
The aim of the study was to evaluate the efficacy of oregano essential oil (OEO) incorporated in Na-alginate edible films when applied to sliced ham inoculated with a cocktail of Listeria monocytogenes strains, with or without pretreatment by high pressure processing (HPP). Microbiological, physicochemical and sensory analyses (in Listeria-free slices) were performed, while, the presence/absence and the relative abundance of each Listeria strain, was monitored by pulsed field gel electrophoresis (PFGE). The OEO incorporation in the films, caused approximately 1.5 log reduction in Listeria population at 8 and 12 °C at the end of the storage period, and almost 2.5 log reduction at 4 °C. The HPP treatment caused 1 log reduction to the initial Listeria population, while levels kept on decreasing throughout the storage for all the tested temperatures. The pH of the samples was higher in the cases where HPP was involved, and the samples were evaluated as less spoiled. Furthermore, the presence of OEO in the films resulted in color differences compared to the control samples, whilst the aroma of these samples was improved. In conclusion, the combined application of HPP and OEO edible films on the slices, led to a significant reduction or absence of the pathogen. View Full-Text
Keywords: Listeria monocytogenes; spoilage; Ready-To-Eat meat, antimicrobial packaging; antimicrobial compounds; non-thermal processing, Infrared spectroscopy Listeria monocytogenes; spoilage; Ready-To-Eat meat, antimicrobial packaging; antimicrobial compounds; non-thermal processing, Infrared spectroscopy
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MDPI and ACS Style

Pavli, F.; Argyri, A.A.; Skandamis, P.; Nychas, G.-J.; Tassou, C.; Chorianopoulos, N. Antimicrobial Activity of Oregano Essential Oil Incorporated in Sodium Alginate Edible Films: Control of Listeria monocytogenes and Spoilage in Ham Slices Treated with High Pressure Processing. Materials 2019, 12, 3726. https://doi.org/10.3390/ma12223726

AMA Style

Pavli F, Argyri AA, Skandamis P, Nychas G-J, Tassou C, Chorianopoulos N. Antimicrobial Activity of Oregano Essential Oil Incorporated in Sodium Alginate Edible Films: Control of Listeria monocytogenes and Spoilage in Ham Slices Treated with High Pressure Processing. Materials. 2019; 12(22):3726. https://doi.org/10.3390/ma12223726

Chicago/Turabian Style

Pavli, Foteini, Anthoula A. Argyri, Panagiotis Skandamis, George-John Nychas, Chrysoula Tassou, and Nikos Chorianopoulos. 2019. "Antimicrobial Activity of Oregano Essential Oil Incorporated in Sodium Alginate Edible Films: Control of Listeria monocytogenes and Spoilage in Ham Slices Treated with High Pressure Processing" Materials 12, no. 22: 3726. https://doi.org/10.3390/ma12223726

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