Control of Staphylococcus aureus biofilms by the application of single and combined treatments based in plant essential oils

2018 ◽  
Vol 286 ◽  
pp. 128-138 ◽  
Author(s):  
Daniel Vázquez-Sánchez ◽  
Juliana Antunes Galvão ◽  
Marina Rodrigues Mazine ◽  
Eduardo Micotti Gloria ◽  
Marília Oetterer
2020 ◽  
Author(s):  
Meryem Karacam ◽  
Durmus Alpaslan Kaya

In this study, the antimicrobial activity of essential oils obtained from Thymbra spicata L., Lavandula angustifolia Mill. and Myrtus communis L. on the pathogens causing eczema Staphylococcus aureus (ATCC 29213), Staphylococcus epidermidis (ATCC 12228), Escheria coli (ATCC 25922), Acinetobacter baumannii (ATCC 43498), Pseudomonas aeruginosa (ATCC 27853) ve Candida albicans (ATCC 90028) were investigated. The MIC and MBC values of the essential oils used in the study against the pathogens causing eczema were determined. As a result of the results obtained, antimicrobial activity of plant essential oils used in the study on test microorganisms was determined. Among the essential oils, it was found that the most effective essential oil was thyme followed by the lavender.


2020 ◽  
Vol 13 (11) ◽  
pp. 369
Author(s):  
Fethi Ben Abdallah ◽  
Rihab Lagha ◽  
Ahmed Gaber

Methicillin-resistant Staphylococcus aureus is a major human pathogen that poses a high risk to patients due to the development of biofilm. Biofilms, are complex biological systems difficult to treat by conventional antibiotic therapy, which contributes to >80% of humans infections. In this report, we examined the antibacterial activity of Origanum majorana, Rosmarinus officinalis, and Thymus zygis medicinal plant essential oils against MRSA clinical isolates using disc diffusion and MIC methods. Moreover, biofilm inhibition and eradication activities of oils were evaluated by crystal violet. Gas chromatography–mass spectrometry analysis revealed variations between oils in terms of component numbers in addition to their percentages. Antibacterial activity testing showed a strong effect of these oils against MRSA isolates, and T. zygis had the highest activity succeeded by O. majorana and R. officinalis. Investigated oils demonstrated high biofilm inhibition and eradication actions, with the percentage of inhibition ranging from 10.20 to 95.91%, and the percentage of eradication ranging from 12.65 to 98.01%. O. majorana oil had the highest biofilm inhibition and eradication activities. Accordingly, oils revealed powerful antibacterial and antibiofilm activities against MRSA isolates and could be a good alternative for antibiotics substitution.


2015 ◽  
Vol 67 (3) ◽  
pp. 949-956 ◽  
Author(s):  
Marina Milenkovic ◽  
Dragana Bozic ◽  
Violeta Slavkovska ◽  
Branislava Lakusic

Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) due to the acquisition of resistance to current antimicrobials pose a serious challenge for therapy, and new measures to treat and prevent this infectious pathogen are of crucial importance. Plant essential oils (EOs) and their constituents are promising agents with antimicrobial properties. The aim of this study was to evaluate the antistaphylococcal effect of essential oils from Salvia officinalis using the broth-microdilution method. Essential oils of S. officinalis were isolated from the same individual, but at different life stages - young and old leaves. The effects of combinations of sub-inhibitory concentrations of oil and different antibiotics were evaluated by the checkerboard method. The results, expressed as the fractional inhibitory concentration (FIC) and index (FICI), indicate that the essential oil isolated from young leaves potentiated the inhibitory effect of antibiotics against tested MRSA strains.


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