Silver nanoparticles-essential oils combined treatments to enhance the antibacterial and antifungal properties against foodborne pathogens and spoilage microorganisms

Plant-derived essential oils (EOs) and commercial silver nanoparticles (AgNPs) were tested to evaluate their antibacterial and antifungal efficiency against two pathogenic bacteria (Escherichia coli O157:H7 and Salmonella Typhimurium) and three spoilage fungi (Aspergillus niger, Penicillium chrysoge...

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Bibliographic Details
Published in:Microbial pathogenesis 2022-03, Vol.164, p.105411-105411, Article 105411
Main Authors: Begum, Tofa, Follett, Peter A., Mahmud, Jumana, Moskovchenko, Lana, Salmieri, Stephane, Allahdad, Zahra, Lacroix, Monique
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Antibacterial property
Antifungal Agents - pharmacology
Aspergillus niger
Escherichia coli O157
Essential oil
Life Sciences
Metal Nanoparticles
Microbial Sensitivity Tests
Nanoparticles
Oils, Volatile - pharmacology
Silver - pharmacology
Storage rice
Synergistic effect
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Summary:Plant-derived essential oils (EOs) and commercial silver nanoparticles (AgNPs) were tested to evaluate their antibacterial and antifungal efficiency against two pathogenic bacteria (Escherichia coli O157:H7 and Salmonella Typhimurium) and three spoilage fungi (Aspergillus niger, Penicillium chrysogenum, and Mucor circinelloides). A broth microdilution assay was used to determine the minimal inhibitory concentration (MIC) of EOs and AgNPs. In the MIC assay, the cinnamon EO, Mediterranean formulation, citrus EO and spherical-shaped silver nanoparticles (AgNPs) (AGC 1, AGC 0.5, AGPP and AGPPH) showed moderate to high antibacterial and antifungal properties, with MIC ranging from 7.8 to 62.5 ppm for AgNPs and 312.5–1250 ppm for EOs against the tested bacteria and fungi. The possible interaction between the EOs and the AgNPs was determined using a checkerboard method by evaluating fractional inhibitory concentration (FIC) values. The combination of two or more EOs and AgNPs (Active combination 1: AGPPH+cinnamon EO, Active combination 2: AGC 0.5+Mediterranean formulation+citrus EO, Active combination 3: AGPP+cinnamon EO+Asian formulation+lavang EO) showed synergistic effects (FIC
ISSN:0882-4010
1096-1208
DOI:10.1016/j.micpath.2022.105411