- In Vitro Antimicrobial Activities of Essential Oils Monographed in the European Pharmacopoeia 8th Edition

2015 ◽  
pp. 450-635 ◽  
Keyword(s):  
Essential Oils ◽  
Antimicrobial Activities ◽  
European Pharmacopoeia ◽  
8Th Edition

scholarly journals The Use of Essential Oils from Thyme, Sage and Peppermint against Colletotrichum acutatum

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 114
Author(s):  
Armina Morkeliūnė ◽  
Neringa Rasiukevičiūtė ◽  
Lina Šernaitė ◽  
Alma Valiuškaitė
Keyword(s):  
Essential Oils ◽  
Fungal Pathogens ◽  
Control Plant ◽  
Antimicrobial Activities ◽  
Plant Diseases ◽  
Colletotrichum Acutatum ◽  
Low Toxicity ◽  
Colletotrichum Spp ◽  
Biological Protection

The Colletotrichum spp. is a significant strawberry pathogen causing yield losses of up to 50%. The most common method to control plant diseases is through the use of chemical fungicides. The findings of plants antimicrobial activities, low toxicity, and biodegradability of essential oils (EO), make them suitable for biological protection against fungal pathogens. The aim is to evaluate the inhibition of Colletotrichum acutatum by thyme, sage, and peppermint EO in vitro on detached strawberry leaves and determine EO chemical composition. Our results revealed that the dominant compound of thyme was thymol 41.35%, peppermint: menthone 44.56%, sage: α,β-thujone 34.45%, and camphor: 20.46%. Thyme EO inhibited C. acutatum completely above 200 μL L−1 concentration in vitro. Peppermint and sage EO reduced mycelial growth of C. acutatum. In addition, in vitro, results are promising for biological control. The detached strawberry leaves experiments showed that disease reduction 4 days after inoculation was 15.8% at 1000 μL L−1 of peppermint EO and 5.3% at 800 μL L−1 of thyme compared with control. Our findings could potentially help to manage C. acutatum; however, the detached strawberry leaves assay showed that EO efficacy was relatively low on tested concentrations and should be increased.

Composition and In vitro Antimicrobial Activities of the Essential Oils of Two Populations ofThymus numidicusPoiret

2009 ◽  
Vol 21 (4) ◽  
pp. 374-377 ◽  
Author(s):  
Hocine Laouer ◽  
Nacira Boulaacheb ◽  
Salah Akkal ◽  
Uwe J. Meierhenrich ◽  
Nicolas Baldovini ◽  
...  
Keyword(s):  
Essential Oils ◽  
Antimicrobial Activities ◽  
Two Populations

scholarly journals In VitroAntimicrobial Activity of Essential Oil ofThymus schimperi,Matricaria chamomilla,Eucalyptus globulus, andRosmarinus officinalis

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Awol Mekonnen ◽  
Berhanu Yitayew ◽  
Alemnesh Tesema ◽  
Solomon Taddese
Keyword(s):  
Antimicrobial Activity ◽  
Minimum Inhibitory Concentration ◽  
Essential Oil ◽  
Essential Oils ◽  
Inhibitory Concentration ◽  
Antimicrobial Activities ◽  
Diffusion Method ◽  
Drug Preparation ◽  
Bacteria And Fungi

In this study, thein vitroantimicrobial activities of four plant essential oils (T. schimperi,E. globulus,R. officinalis, andM. Chamomilla) were evaluated against bacteria and fungi. The studies were carried out using agar diffusion method for screening the most effective essential oils and agar dilution to determine minimum inhibitory concentration of the essential oils. Results of this study revealed that essential oils ofT. schimperi,E. globulus, andR. officinaliswere active against bacteria and some fungi. The antimicrobial effect ofM. chamomillawas found to be weaker and did not show any antimicrobial activity. The minimum inhibitory concentration values ofT. schimperiwere<15.75 mg/mL for most of the bacteria and fungi used in this study. The minimum inhibitory concentration values of the other essential oils were in the range of 15.75–36.33 mg/mL against tested bacteria. This study highlighted the antimicrobial activity of the essential oil ofE. globulus,M. chamomilla,T. Schimperi, andR. officinalis. The results indicated thatT. schimperihave shown strong antimicrobial activity which could be potential candidates for preparation of antimicrobial drug preparation.

Use of rosemary, oregano, and a commercial blend of essential oils in broiler chickens: In vitro antimicrobial activities and effects on growth performance1

2012 ◽  
Vol 90 (3) ◽  
pp. 813-823 ◽  
Author(s):  
N. Mathlouthi ◽  
T. Bouzaienne ◽  
I. Oueslati ◽  
F. Recoquillay ◽  
M. Hamdi ◽  
...  
Keyword(s):  
Essential Oils ◽  
Broiler Chickens ◽  
Antimicrobial Activities

scholarly journals Antioxidant and antimicrobial activities of Lavandula angustifolia Mill. field-grown and propagated in vitro

2017 ◽  
Vol 29 (2) ◽  
pp. 161-180 ◽  
Author(s):  
Dominika Andrys ◽  
Danuta Kulpa ◽  
Monika Grzeszczuk ◽  
Magdalena Bihun ◽  
Agnieszka Dobrowolska
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Essential Oils ◽  
Root System ◽  
Antimicrobial Activities ◽  
Positive Influence ◽  
Ms Medium ◽  
Lavandula Angustifolia ◽  
Number Of Shoots

AbstractIn the study, micropropagation of three varieties of Lavandula angustifolia was developed, and the appearance of trichomes, antioxidant activity of extracts and antimicrobial activity of essential oils isolated from plants growing in field conditions and in vitro cultures were compared. The study evaluated the number of shoots, and the height and weight of the plants grown on media with additions of BAP, KIN and 2iP. The greatest height was attained by the lavenders growing on MS medium with the addition of 1 mg dm-32iP - ‘Ellagance Purple’. The greatest number of shoots was developed by the ‘Ellagance Purple’ and ‘Munstead’ plants growing on the medium with 2 mg dm-3BAP. The highest weight was attained by the plants growing on the medium with the highest concentration of BAP - 3 and 5 mg dm-3. Moreover, the present study determined the influence of media with the addition of different concentrations of IBA and media with a variable mineral composition (½, ¼, and complete composition of MS medium) and with the addition of IBA or NAA for rooting. The majority of the media used had a positive influence on the development of the root system. The longest root system was observed in ‘Ellagance Purple’ growing on the medium composed of ¼ MS with 0.2 mg dm-3NAA. All the examined oils exhibited activity towards S. aureus, S. epidermidis, P. aeruginosa, E. coli and C. albicans. The majority of the essential oils isolated from the plants propagated in vitro exhibited stronger antimicrobial activity than the field-grown plants. The plants propagated under in vitro conditions demonstrated considerably higher antioxidant activity as compared with the field-grown plants, which was determined using the DPPH, FRAP and ABTS assay.

scholarly journals Chitosan-Stabilized Ag Nanoparticles with Superior Biocompatibility and Their Synergistic Antibacterial Effect in Mixtures with Essential Oils

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 826 ◽  
Author(s):  
Ludmila Cinteza ◽  
Cristina Scomoroscenco ◽  
Sorina Voicu ◽  
Cristina Nistor ◽  
Sabina Nitu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oils ◽  
Metallic Nanoparticles ◽  
Synergistic Effects ◽  
Medical Application ◽  
Colloidal Dispersion ◽  
Multidrug Resistant ◽  
Antimicrobial Activities ◽  
Promising Alternative

Silver nanoparticles (AgNPs) are considered a promising alternative to the use of antibiotics in fighting multidrug-resistant pathogens. However, their use in medical application is hindered by the public concern regarding the toxicity of metallic nanoparticles. In this study, rationally designed AgNP were produced, in order to balance the antibacterial activity and toxicity. A facile, environmentally friendly synthesis was used for the electrochemical fabrication of AgNPs. Chitosan was employed as the capping agent, both for the stabilization and to improve the biocompatibility. Size, morphology, composition, capping layer, and stability of the synthesized nanoparticles were characterized. The in vitro biocompatibility and antimicrobial activities of AgNPs against common Gram-negative and Gram-positive bacteria were evaluated. The results revealed that chitosan-stabilized AgNPs were nontoxic to normal fibroblasts, even at high concentrations, compared to bare nanoparticles, while significant antibacterial activity was recorded. The silver colloidal dispersion was further mixed with essential oils (EO) to increase the biological activity. Synergistic effects at some AgNP–EO ratios were observed, as demonstrated by the fractionary inhibitory concentration values. Our results reveal that the synergistic action of both polymer-stabilized AgNPs and essential oils could provide a significant efficiency against a large variety of microorganisms, with minimal side effects.

scholarly journals Volatilome Analyses and In Vitro Antimicrobial Activity of the Essential Oils from Five South African Helichrysum Species

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3196 ◽  
Author(s):  
Basma Najar ◽  
Valeria Nardi ◽  
Claudio Cervelli ◽  
Giulia Mecacci ◽  
Francesca Mancianti ◽  
...  
Keyword(s):  
Essential Oils ◽  
South African ◽  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Gas Chromatography Mass Spectrometry ◽  
Good Effect ◽  
Similar Amount ◽  
Microsporum Canis ◽  
Agar Disc

Helichrysum genus was used in folk South African medicine to treat various human disorders. As a part of our on-going research addressing the exploitation of South African plants belonging to this genus, five species were investigated for their volatile and antimicrobial activities. The volatile organic compounds (VOCs) and the essential oils (EOs) were analysed by gas chromatography mass spectrometry (GC-MS). Microdilution was the method used for assessing both antimycotic and antibacterial activities, which was also tested by Kirby-Bauer agar disc diffusion. Total monoterpenes (TMs) dominated the VOCs of four species (H. trilineatum (70.6%), H. edwardsii (79.3%), H. cooperi (84.5%), and H. pandurifolium (57.0%)). H. cooperi and H. edwardsii EOs showed the predominance of TMs (68.2% and 84.5%, respectively), while H. pandurifolium and H. trilineatum EOs were characterized by the prevalence of TSs (86.5% and 43.6%, respectively). H. odoratissimum EO evidenced a similar amount of both TMs (49.5%) and TSs (46.4%). Microsporum canis was more sensitive to these EOs. The lowest minimum inhibitory concentration (MIC) was observed with H. pandurifolium and H. edwardsii EOs (0.25%). H. pandurifolium and H. trilineatum had a good effect on Staphylococcus aureus (MIC 5%). These findings open new perspectives for the exploitation of these natural compounds for application in cosmetics and pharmaceutics.

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