Effect of gamma radiation and oregano essential oil on murein and ATP concentration of Listeria monocytogenes
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The effects of gamma radiation and of oregano essential oil alone or in combination with radiation on murein composition of Listeria monocytogenes and on the intracellular and extracellular concentration of ATP were evaluated. The bacterial strain was treated with two radiation doses, 1.2 kGy to induce cell damage and 3.5 kGy to cause cell death. Oregano essential oil was used at 0.020 and 0.025% (wt/vol), which is the MIC. All treatments had a significant effect (P < or = 0.05) on the murein composition, although some muropeptides did not seem to be affected by the treatment. Each treatment influenced differently the relative percentage and number of muropeptides. There was a significant correlation (P < or = 0.05) between the reduction of intracellular ATP and increase in extracellular ATP, following treatment of the cells with oregano oil. The reduction of intracellular ATP was even more important when essential oil was combined with irradiation, but irradiation of L. monocytogenes alone induced a significant decrease (P < or = 0.05) of the internal ATP without affecting the external ATP. Transmission electron microscopic observation revealed that oregano oil and irradiation have an effect on cell wall structure.
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Use of oregano essential oil in combination with irradiation of L. monocytogenes and S. aureus resulted in a more significant reduction of their intracellular ATP levels.
“The use of oregano EO in combination with the irradiation of L. monocytogenes and S. aureus resulted in a more significant reduction of their intracellular ATP levels [95,96].”
From Effect of essential oils on pathogenic bacteria (2013) · cites this paper as [95]
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“aureus resulted in a more significant reduction of their intracellular ATP levels [95,96].”
Background
- Authors
- Caillet, S., & Lacroix, M.
- Affiliations
- Institut National de la Recherche Scientifique (CA)
- Corresponding author
- Lacroix, Monique
- ORCID
- Lacroix, Monique
- Venue
- Journal of Food Protection
- Publisher
- Elsevier BV
- Published
- 2006-12
- Volume
- 69
- Issue
- 12
- Pages
- 2961-2969
- ISSN
- 0362-028X (ISSN-L)
- OpenAlex
- W84095586
- Cited by
- 35
- References
- 36
- Citations by year
- 2025: 2 · 2023: 4 · 2022: 4 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 1 · 2016: 1 · 2013: 3 · 2012: 3
- FWCI
- 3.22
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Food Protection (publishedVersion)
- PubMed (publishedVersion)
- EspaceINRS (National Institute for Scientific Research (Canada)) (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Listeria monocytogenes in Food Safety
- Life Sciences › Agricultural and Biological Sciences › Food Science › Radiation Effects and Dosimetry
- Keywords
- Listeria monocytogenes, gamma radiation, oregano essential oil, muropeptides, intracellular ATP, extracellular ATP, cell wall damage, foodborne pathogen inactivation
- MeSH terms
- Adenosine Triphosphate, Consumer Product Safety, Dose-Response Relationship, Radiation, Food Irradiation, Food Microbiology, Food Preservation, Gamma Rays, Humans, Listeria monocytogenes, Microbial Sensitivity Tests, Oils, Volatile, Peptidoglycan, Plant Oils, Colony Count, Microbial, Origanum, Microscopy, Electron, Transmission
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