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Synergistic activities of gaseous oregano and thyme thymol essential oils against Listeria monocytogenes on surfaces of a laboratory medium and radish sprouts.
Food Microbiol. 2020 Apr; 86:103357.FM

Abstract

We investigated combinations of gaseous essential oils (EO gases) for their synergistic inhibitory activities against Listeria monocytogenes on a laboratory medium and radish sprouts. The minimum inhibitory concentrations and minimum lethal concentrations of oregano, thyme thymol, and cinnamon bark EO gases against L. monocytogenes were 0.0781 μL/mL on nutrient agar supplemented with glucose and bromocresol purple (NGBA). A checkerboard assay showed that combinations of oregano and thyme thymol EO gases and of oregano and cinnamon bark EO gases exert the strongest synergistic antilisterial activity (fractional inhibitory concentration index [FICI] = 0.3750). A combination of thyme thymol and cinnamon bark EO gases also had a synergistic effect (FICI = 0.5000) on L. monocytogenes on NGBA. Combinations of oregano and thyme thymol EO gases were tested for synergistic antimicrobial activity against L. monocytogenes on radish sprouts. A combination of these gases, each at 0.313 μL/mL, caused a significant (P ≤ 0.05) reduction in the number of L. monocytogenes on radish sprouts compared with reductions caused by treatment with oregano or thyme thymol EO gas alone at the same concentration. Our findings provide information that will be useful when developing antimicrobial applications using EO gases to control L. monocytogenes in the food industry.

Authors+Show Affiliations

Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.Department of Food and Nutrition, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk, 54538, Republic of Korea.Center for Food Safety and Department of Food Science and Technology, University of Georgia, 1109 Experiment Street, Griffin, GA, 30223-1797, USA.Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea. Electronic address: escheri@korea.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31703857

Citation

Cho, Yurim, et al. "Synergistic Activities of Gaseous Oregano and Thyme Thymol Essential Oils Against Listeria Monocytogenes On Surfaces of a Laboratory Medium and Radish Sprouts." Food Microbiology, vol. 86, 2020, p. 103357.
Cho Y, Kim H, Beuchat LR, et al. Synergistic activities of gaseous oregano and thyme thymol essential oils against Listeria monocytogenes on surfaces of a laboratory medium and radish sprouts. Food Microbiol. 2020;86:103357.
Cho, Y., Kim, H., Beuchat, L. R., & Ryu, J. H. (2020). Synergistic activities of gaseous oregano and thyme thymol essential oils against Listeria monocytogenes on surfaces of a laboratory medium and radish sprouts. Food Microbiology, 86, 103357. https://doi.org/10.1016/j.fm.2019.103357
Cho Y, et al. Synergistic Activities of Gaseous Oregano and Thyme Thymol Essential Oils Against Listeria Monocytogenes On Surfaces of a Laboratory Medium and Radish Sprouts. Food Microbiol. 2020;86:103357. PubMed PMID: 31703857.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synergistic activities of gaseous oregano and thyme thymol essential oils against Listeria monocytogenes on surfaces of a laboratory medium and radish sprouts. AU - Cho,Yurim, AU - Kim,Hoikyung, AU - Beuchat,Larry R, AU - Ryu,Jee-Hoon, Y1 - 2019/10/25/ PY - 2019/07/09/received PY - 2019/10/21/revised PY - 2019/10/22/accepted PY - 2019/11/10/entrez PY - 2019/11/11/pubmed PY - 2020/2/23/medline KW - Fresh produce KW - Gaseous essential oil KW - Listeria monocytogenes KW - Radish sprouts KW - Synergistic antilisterial activity SP - 103357 EP - 103357 JF - Food microbiology JO - Food Microbiol VL - 86 N2 - We investigated combinations of gaseous essential oils (EO gases) for their synergistic inhibitory activities against Listeria monocytogenes on a laboratory medium and radish sprouts. The minimum inhibitory concentrations and minimum lethal concentrations of oregano, thyme thymol, and cinnamon bark EO gases against L. monocytogenes were 0.0781 μL/mL on nutrient agar supplemented with glucose and bromocresol purple (NGBA). A checkerboard assay showed that combinations of oregano and thyme thymol EO gases and of oregano and cinnamon bark EO gases exert the strongest synergistic antilisterial activity (fractional inhibitory concentration index [FICI] = 0.3750). A combination of thyme thymol and cinnamon bark EO gases also had a synergistic effect (FICI = 0.5000) on L. monocytogenes on NGBA. Combinations of oregano and thyme thymol EO gases were tested for synergistic antimicrobial activity against L. monocytogenes on radish sprouts. A combination of these gases, each at 0.313 μL/mL, caused a significant (P ≤ 0.05) reduction in the number of L. monocytogenes on radish sprouts compared with reductions caused by treatment with oregano or thyme thymol EO gas alone at the same concentration. Our findings provide information that will be useful when developing antimicrobial applications using EO gases to control L. monocytogenes in the food industry. SN - 1095-9998 UR - https://www.unboundmedicine.com/medline/citation/31703857/Synergistic_activities_of_gaseous_oregano_and_thyme_thymol_essential_oils_against_Listeria_monocytogenes_on_surfaces_of_a_laboratory_medium_and_radish_sprouts_ DB - PRIME DP - Unbound Medicine ER -