Seasonality Effects on Antibacterial and Antibiotic Potentiating Activity against Multidrug-Resistant Strains of Escherichia coli and Staphylococcus aureus and ATR-FTIR Spectra of Essential Oils from Vitex gardneriana Leaves

2020 ◽  
Vol 77 (12) ◽  
pp. 3969-3977
Author(s):  
Raimundo Luiz Silva Pereira ◽  
Thiago Sampaio de Freitas ◽  
Priscilla Ramos Freitas ◽  
Ana Carolina Justino de Araújo ◽  
Fábia Ferreira Campina ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Essential Oils ◽  
Multidrug Resistant ◽  
Ftir Spectra ◽  
Resistant Strains ◽  
And Staphylococcus Aureus

scholarly journals Antibacterial Activity of Leaves and Rhizome of Curcuma xanthorrhiza Essential Oils on Different Distillation Time

2018 ◽  
Vol 3 (3) ◽  
pp. 116-120
Author(s):  
Nur Syafiqah Nadiah Mohammad Rafi ◽  
Irmanida Batubara ◽  
Anthony Nyangson Steven
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Essential Oils ◽  
Mobile Phase ◽  
Clear Zone ◽  
Rf Values ◽  
Curcuma Xanthorrhiza ◽  
Layer Chromatography ◽  
And Staphylococcus Aureus

This research aims to determine the antibacterial activity of Curcuma xanthorrhiza leaves and rhizomes essential oil with different distillation time of 2 hours, 4 hours and 6 hours against Escherichia coli and Staphylococcus aureus. The essential oils produced then separated by thin layer chromatography (TLC) with n-hexane: toluene: dichloromethane 1:8:1 as the mobile phase. The result shows that on the first two hours distillation gave the highest yield compared to the next two hours or four hours. Based on TLC chromatograms, the highest content of compounds found at 4-6 hours distillation time. TLC bioautography contact was used for antibacterial activity tested on chromatogram and the clear zone appears on it indicates the spots were active as antibacterial activity against both bacteria with Rf values of 0.35 and 0.49 for rhizomes, rhizome essential oils 4-6 hours distillation time as the most significance active.

scholarly journals Evaluation of antibacterial and antioxidant activities of three types of benzoin resin

2018 ◽  
Vol 9 (4) ◽  
pp. 408-411
Author(s):  
Zineb Hacini ◽  
Fatima Khedja ◽  
Ibrahim Habib ◽  
Zaouia Kendour ◽  
Zineb Debba
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antioxidant Activity ◽  
Essential Oils ◽  
Pathogenic Bacteria ◽  
Antioxidant Activities ◽  
Ic50 Values ◽  
Therapeutic Properties ◽  
Resin Extract ◽  
And Staphylococcus Aureus

The benzoin resin is used extensively in traditional medicine for its many reported therapeutic properties. The essential oils of three different types of benzoin resin were extracted using the traditional method in this study. The yield of essential oils of the white, red and gray types of resin was 1.01, 0.92 and 0.54%, respectively. The obtained extracts were tested against two types of pathogenic bacteria, Staphylococcus aureus and Escherichia coli. The tests showed that essential oil of gray type resin is effective against both Escherichia coli (14 mm) and Staphylococcus aureus (11 mm). The antioxidant activity has been also evaluated to compare the efficiency of different type of resin with DPPH· assay. In the DPPH· system, the antioxidant activity of the red resin extract (0.01 μg/mL) was superior to that of the white (27.32 μg/mL) and gray (42.90 μg/mL) extracts, with IC50 values, respectively.

scholarly journals Inhibitory effect and disinfectant activity of Syzygium aromaticum L. and Ocimum gratissimum L. essential oils against Escherichia coli and Staphylococcus aureus isolated from sheep carcasses

2019 ◽  
Vol 11 ◽  
pp. 1-12
Author(s):  
Larissa de Oliveira ◽  
Sabrina de Souza Sales
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Essential Oils ◽  
Inhibitory Effect ◽  
Syzygium Aromaticum ◽  
Ocimum Gratissimum ◽  
Broth Macrodilution ◽  
And Staphylococcus Aureus ◽  
Suspension Test ◽  
Better Than

Syzygium aromaticum L. and Ocimum gratissimum L. essential oils were tested for their effectiveness in reduction the counts of inoculated Staphylococcus aureus and Escherichia coli in sheepmeat. The inhibitory effect was analysed by disk diffusion and broth macrodilution method with four strains and seven concentrations. Disinfectant activity of the oils was assessed using the suspension test with two strains and two concentrations. The inhibition was observed at concentrations 400, 200 and 100 μL/mL. Syzygium aromaticum L. oil was better than Ocimum gratissimum L. against bacteria isolated from sheep carcasses. The minimum bactericidal concentration of the essential oils aginst inocula ranged from 50 to 200 μL/mL. The suspension test showed that after 5 minutes of contact, Syzygium aromaticum L. disinfectant at 400 μL/mL deactivated the inoculants completely. The results demonstrated that essential oils exerted a significant bactericidal and bacteriostatic action against pathogens.

scholarly journals Organic management vs. conventional management influence the antimicrobial activity of essential oils of Origanum vulgare L

2020 ◽  
Vol 9 (11) ◽  
pp. e4239118504
Author(s):  
Maysa Mathias Alves Pereira ◽  
Ludmila Caproni Morais ◽  
Natália Jubram Zeneratto ◽  
Willian de Souza Matias Reis ◽  
Omar Cabezas Gómez ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Essential Oils ◽  
Origanum Vulgare ◽  
Family Farmers ◽  
Conventional Management ◽  
Organic Cultivation ◽  
And Staphylococcus Aureus

The objective this stud was to evaluate the antimicrobial activity of essential oils (organic vs. conventional) of Origanum vulgare L. in the action against Candida albicans, Escherichia coli and Staphylococcus aureus. The inoculation of rhizobacteria (environmental (ME) and Bacillus subtilis) potentiated the antimicrobial action.  The essential oils of Traditional (organic) cultivation presented antibacterial action and antifungal, while the essential oil of conventional cultivation (NPK) showed no any antibacterial or antifungal activity. It was concluded that the formulation of vermicomposting and the use of rhizobacteria are potential technologies and tools for family farmers and traditional community in the cultivation of orégano.

scholarly journals Chemical Composition and Antibacterial Activity of Cupressus dupreziana A. Camus

2007 ◽  
Vol 2 (9) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
Messaoud Ramdani ◽  
Oualida Rached ◽  
Hocine Laouer ◽  
Meriem El Koli ◽  
Takia Lograda
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Diffusion Method ◽  
Germacrene D ◽  
And Staphylococcus Aureus

The essential oils obtained by hydrodistillation from the green branchlets of Cupressus dupreziana A. Camus growing wild in Tassili n'Ajjer (Algeria) were analyzed by GC and GC/MS. The main constituents of the essential oils were α-pinene (27.2% - 44.2%), germacrene D (16.2% - 27.2%) and Δ3-carene (14.2% - 26.7%). The oils showed insignificant activity on the growth of Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus aureus (ATCC 25923), when investigated by the diffusion method.

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