Essential oils from Moroccan plants as potential chemosensitisers restoring antibiotic activity in resistant Gram-negative bacteria

In the present study we evaluated the composition and antimicrobial activity of various rose oils from Bulgaria, Turkey, Morocco, Iran and China against three Gram-positive, three Gram-negative bacteria and two yeasts. The composition of the studied essential oils was determined by GC and GC/MS. Citronellol was the major compound of all the oil samples: 31.7% (Chinese oil); 32.6% (Iranian oil); 33.6% (Moroccan oil); 34.9% (Bulgarian oil) and 38,7 % (Turkish oil). For the Bulgarian oil we could determine the highest activity against all microorganisms. Bacillus cereus ATCC 11778 was the most sensitive strain to Bulgarian rose oil (MCC 128 μg/mL) and Pseudomonas aeruginosa ATCC 9627 and P. fluorescens were more resistible strains (MCC 4096 μg/mL). Antimicrobial activity of rose oils is mainly due to the action of oxygenated acyclic monoterpenes citronellol, geraniol, nerol and linalool, their acetate derivatives and the phenolic compound eugenol.

Download Full-text

Antibacterial Activity and Chemical Composition of the Essential Oil of Grammosciadium platycarpum Boiss. from Iran

Zeitschrift für Naturforschung C ◽

10.1515/znc-2005-1-206 ◽

2005 ◽

Vol 60 (1-2) ◽

pp. 30-34 ◽

Cited By ~ 26

Author(s):

Ali Sonboli ◽

Fereshteh Eftekhar ◽

Morteza Yousefzadi ◽

Mohammad Reza Kanani

Keyword(s):

Pseudomonas Aeruginosa ◽

Antibacterial Activity ◽

Chemical Composition ◽

Essential Oil ◽

Essential Oils ◽

Antibacterial Activities ◽

Gram Negative Bacteria ◽

Gram Negative ◽

Two Samples

The chemical composition of the essential oils obtained from two samples (GP1 and GP2) of Grammosciadium platycarpum Boiss. was analyzed by GC and GC-MS. The analysis of the oils resulted in the identification of twenty-two constituents. Linalool (79.0% - GP1, 81.8% - GP2) and limonene (10.0%, 5.8%) were found to be the major components, respectively. The in vitro antibacterial activities of these oils and their main compounds against seven Gram-positive and Gram-negative bacteria were investigated. The results exhibited that the total oils and their major components possess strong to moderate activities against all the tested bacteria except for Pseudomonas aeruginosa.

Download Full-text

Antimicrobial effect of essential oils of some Fijian medicinal plant leaves on pathogenic bacteria

The South Pacific Journal of Natural and Applied Sciences ◽

10.1071/sp16005 ◽

2016 ◽

Vol 34 (2) ◽

pp. 35

Author(s):

Prayna P. P. Maharaj ◽

Riteshma Devi ◽

Surendra Prasad

Keyword(s):

Pseudomonas Aeruginosa ◽

Antimicrobial Agent ◽

Essential Oils ◽

Pathogenic Bacteria ◽

Antibacterial Properties ◽

Antimicrobial Activities ◽

Diffusion Method ◽

Gram Negative Bacteria ◽

Gram Positive ◽

Gram Negative

Fiji is highly populated with plants containing essential oils (EO). The essential oils extracted from the leaves of the selected Fijian leafy plants were screened against two Gram-negative bacteria (Salmonella typhimurium, Pseudomonas aeruginosa) and three Gram-positive bacteria (Staphylococcus aureus, Enterococcus faecalis and Bacillus subtilis). The agar diffusion method was used to examine the antimicrobial activities of the extracted EO. All the EO tested showed antibacterial properties against one or more strains while none of the EO was active against Pseudomonas aeruginosa. Viburnum lantana (Wayfaring tree), Annona muricata (Soursop), Coleus amboinicus (Spanish thyme) and Cinnamomum zeylancium (Cinnamon) showed good inhibition against both Gram-positive and Gram-negative bacteria and proved as worthy source of antimicrobial agent. These findings will help the Pacific population to use the studied plants leaves as antimicrobial agent.

Download Full-text

Synergistic interactions between doxycycline and terpenic components of essential oils encapsulated within lipid nanocapsules against gram negative bacteria

International Journal of Pharmaceutics ◽

10.1016/j.ijpharm.2015.11.042 ◽

2016 ◽

Vol 498 (1-2) ◽

pp. 23-31 ◽

Cited By ~ 30

Author(s):

C. Valcourt ◽

P. Saulnier ◽

A. Umerska ◽

M.P. Zanelli ◽

A. Montagu ◽

...

Keyword(s):

Essential Oils ◽

Gram Negative Bacteria ◽

Lipid Nanocapsules ◽

Gram Negative ◽

Synergistic Interactions

Download Full-text

Minimum inhibitory concentrations of herbal essential oils and monolaurin for gram-positive and gram-negative bacteria

Molecular and Cellular Biochemistry ◽

10.1007/s11010-005-6604-1 ◽

2005 ◽

Vol 272 (1-2) ◽

pp. 29-34 ◽

Cited By ~ 66

Author(s):

Harry G. Preuss ◽

Bobby Echard ◽

Mary Enig ◽

Itzhak Brook ◽

Thomas B. Elliott

Keyword(s):

Essential Oils ◽

Gram Negative Bacteria ◽

Gram Positive ◽

Gram Negative ◽

Minimum Inhibitory Concentrations

Download Full-text

ANTIBACTERIAL AND ANTI-YEAST EFFECTS OF SOME ESSENTIAL OILS

Proceedings of the Mongolian Academy of Sciences ◽

10.5564/pmas.v58i2.1006 ◽

2018 ◽

pp. 68-76

Author(s):

Urjinlham R ◽

Oyunbileg B ◽

Anumandal O ◽

Sainbileg P ◽

Rentsenkhand Ts

Keyword(s):

Antimicrobial Activity ◽

Essential Oils ◽

Mentha Piperita ◽

Lag Phase ◽

Gram Negative Bacteria ◽

Synergistic Activity ◽

Aromatic Plants ◽

Gram Positive ◽

Gram Negative ◽

Ledum Palustre

Essential oils from aromatic plants of Ledum palustre L. and Mentha piperita L. were extracted using steam distillation and the antimicrobial effects were evaluated alone and in combinations against food-borne pathogens of Gram-positive and Gram-negative bacteria and food related-yeasts (Bacillus subtilis, Escherichia coli, Saccharomyces cerevisiae, Schizosaccharomyce spombe, and Geotrichum candidum). Essential oils from two aromatic plants used in this study showed the antimicrobial activity against bacteria and yeast, which was found to be concentration dependent. The effects of Ledum palustre L. and Mentha piperita L. plants essential oils against yeast and Gram-negative bacteria at concentrations of 0.5 ul/ml and 0.25 ul/ml extended lag phase or adaptation phase by 48 hours, respectively. Gram-positive bacteria were found to be susceptible to the studied two plants essential oils. When the effects of antimicrobial activity of two essential oils were tested in combination against bacteria and yeast in vitro, the MIC value was in the range of 0.125-0.5 ul/ml and showed synergistic activity against E.coli and additive values against B.subtilis and S.cerevisiae.

Download Full-text