Effet de l’huile essentielle d’Origanum vulgare et de Thymus ciliatus sur Pseudomonas aeruginosa VIM-2 carbapénèmase

Amrouni, S.; Touati, Meriem; Hadef, Youcef; Djahoudi, Abdelghani

doi:10.1007/s10298-014-0842-x

Cited by 13 publications

(12 citation statements)

References 16 publications

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“…This antibacterial effect is mainly provided by carvacrol. Thus, it has ATPase inhibitory activity (Gill and Holley, 2006) inducing dissipation proton-motive force by inhibiting other enzymes in the periplasmic space after the treatment of the bacterial cytoplasmic membrane (Ultee et al, 2002;Benarfa et al,2006 ;Cristani et al,2007 ;Xu et al, 2008).…”

Section: Antibacterial Activity Of Essential Oilmentioning

confidence: 99%

“…A range of dilutions of the essential oil in DMSO (dimethylsulfoxide) were prepared so as to obtain Final concentrations of 1%, 0.5 %, 0.4 % , 0.3% , 0.25 % , 0.2% , 0.15 %, 0.1% , 0.075% , 0.05% , 0.025 % and 0.012 % , essential oil per milliliter of culture medium (Djahoudi et al, 2011;Amrouni et al, 2014).…”

Section: Determination Of Minimum Inhibitory Concentrations (Mic)mentioning

confidence: 99%

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Chemical composition and antibacterial activity of the essential oil of Thymus ciliatus growing wild in North Eastern Algeria

Heni¹,

Bennadja²,

Djahoudi³

2015

J App Pharm Sci

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The essential oil extracted from the aerial parts of Thymus ciliatus harvested in the region of Tawra (North-East of Algeria) gave a yield of 2.5%. Its analysis by GC / MS has allowed the identification of twenty-four elements, mainly phenols and terpenes. The main components were: Thymol (67.78 %), p-cymene (12.25%), pseudolimonene (5.10 %), and γ-terpinène (4.42 %). Antimicrobial activity was evaluated on two pathogenic foodborne bacterial strains: Bacillus cereus and Listeria monocytogenes. These pathogens showed high sensitivity with respect to the essential oil with respective inhibition diameters of 28.6and 40mm of relatively low MICs of 0.18mg / ml. Due to these results, we may propose the use of this natural substance as a substitute for additives used in food protection.

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Section: Antibacterial Activity Of Essential Oilmentioning

confidence: 99%

Section: Determination Of Minimum Inhibitory Concentrations (Mic)mentioning

confidence: 99%

Chemical composition and antibacterial activity of the essential oil of Thymus ciliatus growing wild in North Eastern Algeria

Heni¹,

Bennadja²,

Djahoudi³

2015

J App Pharm Sci

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“…The content of EOs increased during the flowering stage and reached 2.10% and 2.85% for T. numidicus-B and T. numidicus-T, respectively, showing that this thyme species is richer in EOs than the two others. Conversely in a similar study, Amrouni et al [7] reported a slight higher relative percentage (3%) of EOs present in the oils of T. ciliatus collected from another Eastern region not far from Berrahal and Tacha (Djebel El Edough-Annaba). However, Hadef et al [15] found lower percentages of EOs in T. numidicus originated from Lakhdaria, a region in center Algeria.…”

Section: Thymus Species Content In Eosmentioning

confidence: 76%

“…EOs (essential oils) contained in plants constitute a potential source of bioactive molecules [7,8]. In the opposite of lipids (fixed oils), EOs are volatile and odorous substances also called chemotypes because of the difference in quantity and quality of their compounds present in the same genus; this difference is related to genome or gene expression differences [9] and to some abiotic parameters, such as geographical origin, harvest time, temperature, storage conditions…”

Section: Introductionmentioning

confidence: 99%

“…Their antioxidant and antimicrobial properties provide the basis for many applications in raw and processed food preservation and pharmaceutical products [12]. Essential oils have been investigated in several studies where the scope was the chemical analysis of these compounds and their biological activities against several bacteria, yeast and fungi [7,13,14]. Research interests must continue to identify EO bioactive compounds present in Thymus species native to different parts of the world.…”

mentioning

confidence: 99%

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Phytochemical Characterization of the Essential Oils Obtained from Mediterranean Thymus spp. (Lamiacea) Harvested at Different Stages of Growth

Touhami¹,

Chefrour²,

Khellaf³

et al. 2017

JPP

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Abstract:To prove more information on the chemical composition of the essential oils of Thymus taxa collected in different Algeria areas, and to determine the effect of harvesting periods on the composition of these essential oils: three Thymus species (T. numidicus, T.ciliatus and T. algeriensis) were collected during two periods of development, the EOs (essential oils) obtained by steam distillation of the aerial parts were analyzed by GC/MS (gas chromatography coupled with mass spectrometry). During the pre-flowering stage, the RP% (relative percentage) of Eos varied between 1.00% and 1.34% for all the species. The content of EOs increased during the flowering stage and reached particularly 2.10% and 2.85% for T. numidicus (from Berrahal) and T. numidicus (from Tacha), respectively. GC/MS analysis showed that these oils are very rich in oxygenated monoterpenes group (76.96%~82.11%) when the plants were harvested during the flowering stage of growth. Thymol was the major compound in the EOs contained in T. numidicus (Berrahal) and T. ciliatus with more than 39% and 54%, respectively. Thymus numidicus (Tacha) and T. algeriensis EOs were characterized by high content in p-cimene-7-ol (78.06% and 26.98%, respectively). These two chemotypes (thymol and p-cimene-7-ol) are considered as antioxidant and antimicrobial agents providing the basis for many applications in processed food preservation and pharmaceutical products.

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Effect of essential oil- and iodine treatments on the bacterial microbiota of the brown alga Ectocarpus siliculosus

2020

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Macroalgae live in tight association with bacterial communities, which impact most aspects of their biology. Clean, ideally axenic, algal starting material is required to control and study these interactions. Antibiotics are routinely used to generate clean tissue; however, bacterial resistance to antibiotics is increasingly widespread and sometimes related to the emergence of potentially pathogenic, multi-resistant strains.In this study, we explore the suitability of two alternative treatments for use with algal cultures: essential oils (EOs; thyme, oregano, and eucalyptus) and povidone-iodine.The impact of these treatments on bacterial communities was assessed by bacterial cell counts, inhibition diameter experiments, and 16S-metabarcoding. Our data show that thyme and oregano essential oils (50% solution in DMSO, 15h incubation) efficiently reduced the bacterial load of algae without introducing compositional biases, but they did not eliminate all bacteria. Povidone-iodine (2% and 5% solution in artificial seawater, 10min incubation) both reduced and changed the alga-associated bacterial community, similar to the antibiotic treatment. The proposed EO-and povidone-iodine protocols are thus promising alternatives when only a reduction of bacterial abundance is necessary and where the phenomena of antibiotic resistance are likely to arise. BBDIodine and essential oil effects on algal microbiome 2 / 28

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Effet de l’huile essentielle d’Origanum vulgare et de Thymus ciliatus sur Pseudomonas aeruginosa VIM-2 carbapénèmase

Cited by 13 publications

References 16 publications

Chemical composition and antibacterial activity of the essential oil of Thymus ciliatus growing wild in North Eastern Algeria

Chemical composition and antibacterial activity of the essential oil of Thymus ciliatus growing wild in North Eastern Algeria

Phytochemical Characterization of the Essential Oils Obtained from Mediterranean Thymus spp. (Lamiacea) Harvested at Different Stages of Growth

Effect of essential oil- and iodine treatments on the bacterial microbiota of the brown alga Ectocarpus siliculosus

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