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Article Publish Status: FREE
Abstract Title:

Anti-Biofilm Effect of Selected Essential Oils and Main Components on Mono- and Polymicrobic Bacterial Cultures.

Abstract Source:

Microorganisms. 2019 Sep 12 ;7(9). Epub 2019 Sep 12. PMID: 31547282

Abstract Author(s):

Erika Beáta Kerekes, Anita Vidács, Miklós Takó, Tamás Petkovits, Csaba Vágvölgyi, Györgyi Horváth, Viktória Lilla Balázs, Judit Krisch

Article Affiliation:

Erika Beáta Kerekes

Abstract:

Biofilms are surface-associated microbial communities resistant to sanitizers and antimicrobials. Various interactions that can contribute to increased resistance occur between the populations in biofilms. These relationships are the focus of a range of studies dealing with biofilm-associated infections and food spoilage. The present study investigated the effects of cinnamon (), marjoram (), and thyme () essential oils (EOs) and their main components, i.e., trans-cinnamaldehyde, terpinen-4-ol, and thymol, respectively, on single- and dual-species biofilms of,,and. In dual-species biofilms,was paired with each of the other three bacteria. Minimum inhibitory concentration (MIC) values for the individual bacteria ranged between 0.25 and 20 mg/mL, and trans-cinnamaldehyde and cinnamon showed the highest growth inhibitory effect. Single-species biofilms of,andwere inhibited by the tested EOs and their components at sub-lethal concentrations. Scanning electron microscopy images showed that the three-dimensional structure of mature biofilms embedded in the exopolysaccharide matrix disappeared or was limited to micro-colonies with a simplified structure. In most dual-species biofilms, to eliminate living cells from the matrix, concentrations exceeding the MIC determined for individual bacteria were required.

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