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Article

Development of Biodegradable Films Loaded with Phages with Antilisterial Properties

1
Center of Innovation in Packaging (LABEN), Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Department of Science and Food Technology, Faculty of Technology, Universidad de Santiago de Chile (USACH), Santiago 9170201, Chile
2
Packaging Lab., Institute of Agrochemistry and Food Technology, IATA-CSIC, Av. Agustín Escardino 7, 46980 Paterna, Valencia, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Luc Avérous
Polymers 2021, 13(3), 327; https://doi.org/10.3390/polym13030327
Received: 28 December 2020 / Revised: 15 January 2021 / Accepted: 18 January 2021 / Published: 20 January 2021
(This article belongs to the Special Issue Sustainable Plastics for Active/Intelligent Food Packaging)
The inhibitory and bactericidal capacity of Listex P100 bacteriophage has been studied against different concentrations of Listeria monocytogenes in stationary and exponential phases. Three different matrices were employed to developed films incorporating Listex P100: (1) sodium caseinate, (2) sodium alginate mixed with gelatin, and (3) polyvinyl alcohol (PVOH). All the films were successfully developed by casting at room temperature. These active biodegradable films were optical, structural, and thermally characterized, and their antimicrobial capacities against L. monocytogenes were studied. The incorporation of phages did not affect the morphology, colour, opacity, and thermal stability of polymers. The antimicrobial analysis revealed the bacteriophage presented a high antimicrobial capacity against L. monocytogenes in the stationary phase (4.40 and 6.19 log reduction values or bactericide effect depending on the initial inoculum of the pathogen). Developed films showed antimicrobial capacity close to 1 log after 24 h of incubation at 30 °C. The effectiveness of PVOH films was greater under refrigeration conditions, reaching 2 log reduction after eight days of incubation. The use of these films as a coating in a food or as part of a packaging could improve food safety against the growth of pathogenic microorganisms such as Listeria monocytogenes. View Full-Text
Keywords: bateriophage; Listeria monocytogenes; antimicrobial films; polyvinyl alcohol; sodium caseinate; sodium alginate bateriophage; Listeria monocytogenes; antimicrobial films; polyvinyl alcohol; sodium caseinate; sodium alginate
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MDPI and ACS Style

López de Dicastillo, C.; Settier-Ramírez, L.; Gavara, R.; Hernández-Muñoz, P.; López Carballo, G. Development of Biodegradable Films Loaded with Phages with Antilisterial Properties. Polymers 2021, 13, 327. https://doi.org/10.3390/polym13030327

AMA Style

López de Dicastillo C, Settier-Ramírez L, Gavara R, Hernández-Muñoz P, López Carballo G. Development of Biodegradable Films Loaded with Phages with Antilisterial Properties. Polymers. 2021; 13(3):327. https://doi.org/10.3390/polym13030327

Chicago/Turabian Style

López de Dicastillo, Carol, Laura Settier-Ramírez, Rafael Gavara, Pilar Hernández-Muñoz, and Gracia López Carballo. 2021. "Development of Biodegradable Films Loaded with Phages with Antilisterial Properties" Polymers 13, no. 3: 327. https://doi.org/10.3390/polym13030327

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