scholarly journals The effect of thyme and tea tree oils on morphology and metabolism of Candida albicans.

2014 ◽  
Vol 61 (2) ◽  
Author(s):  
Katarzyna Rajkowska ◽  
Alina Kunicka-Styczyńska ◽  
Marta Maroszyńska ◽  
Mariola Dąbrowska
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Essential Oils ◽  
Broad Spectrum ◽  
Tea Tree Oil ◽  
Control Strain ◽  
Tea Tree ◽  
Candida Sp ◽  
Biochemical Profiles ◽  
Metabolic Properties

Members of Candida species cause significant problems in medicine and in many industrial branches also. In order to prevent from Candida sp. development, essential oils are more and more frequently applied as natural, non-toxic, non-pollutive and biodegradable agents with a broad spectrum of antimicrobial activity. The aim of the research was to determine changes in morphology and metabolic properties of Candida albicans in the presence of thyme and tea tree oils. Changes of enzymatic activity of isolates were observed in the presence of both tested essential oils, and they were primarily associated with loss or decrease of activity of all enzymes detected for control. Furthermore, only for 3 out of 11 isolates additional activity of N-acetyl-β-glucosaminidase, α-mannosidase, α-fucosidase and trypsin was detected. Vivid changes in biochemical profiles were found after treatment with tea tree oil and they were related to loss of ability to assimilate D-xylose, D-sorbitol and D-trehalose. The main differences in morphology of isolates compared to the control strain concerned formation of pseudohyphae structures. Both examined essential oils caused changes in cell and colony morphology, as well as in the metabolism of Candida albicans. However, the extent of differences depends on the type and concentration of an essential oil. The most important finding is the broad spectrum of changes in yeast enzymatic profiles induced by thyme and tea tree oils. It can be supposed that these changes, together with loss of ability to assimilate saccharides could significantly impact Candida albicans pathogenicity.

scholarly journals In Vitro Antifungal Susceptibility Testing of Tea Tree Oil (TTO) 5% Compared with Nystatin against Candida sp. as Important Agent of Oral Candidiasis in HIV/AIDS Patients

2020 ◽  
Vol 32 (3) ◽  
pp. 189
Author(s):  
Eva Lydiawati ◽  
Muhammad Yulianto Listiawan ◽  
Dwi Murtiastutik ◽  
Rahmadewi Rahmadewi ◽  
Cita Rosita Sigit Prakoeswa ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Oral Candidiasis ◽  
Antifungal Susceptibility ◽  
Inhibition Zone ◽  
Tea Tree Oil ◽  
Aids Patients ◽  
Antifungal Effect ◽  
Tea Tree ◽  
Candida Sp ◽  
Hiv Aids

Background: Oral candidiasis is the most common clinical manifestation in a person infected with HIV which has been linked with the severity of the disease. Candida albicans responsible for most oral candidiasis. The increased resistance to the available antifungal drugs can reduce the efficacy of therapy. Therefore, it will be crucial to discover novel antifungal agents. One of them is tea tree oil (TTO) or Melaleuca alternifolia which has a potent antifungal effect to inhibit the growth of Candida sp.  Purpose: To evaluate the antifungal susceptibility of TTO 5% compared with nystatin against Candida sp. taken from HIV/AIDS patients. Methods: The study assessed the antifungal effect of TTO 5% and nystatin against 33 isolates of Candida sp. that was isolated from the oral cavity of 30 HIV/AIDS patients in Dr. Soetomo General Academic Teaching Hospital Surabaya, Indonesia. Antifungal susceptibility was evaluated by the disc diffusion method. The diameter of the inhibition zone was determined as the result of this study. Result: The most strains found in this study was Candida albicans (84.8%). The mean inhibition zone of nystatin against all strains was 23.24 mm whether it was 17.55 mm for TTO 5%. The inhibition zone of both TTO 5% and nystatin in Candida non-albicans were tended to be higher than in Candida albicans. It revealed that the inhibition zone of TTO 5% significantly lower than nystatin (P = 0.00; P < 0.05).Conclusion: Therefore, the antifungal susceptibility of nystatin was significantly higher than TTO 5% against Candida albicans and non-albicans.

scholarly journals Antimicrobial Air Filter Coating with Plant Extracts Against Airborne Microbes

2020 ◽  
Vol 10 (24) ◽  
pp. 9120
Author(s):  
Ha Ram Byun ◽  
Seon Young Park ◽  
Ee Taek Hwang ◽  
Byoung In Sang ◽  
Jiho Min ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Plant Extracts ◽  
Photoelectron Spectroscopy ◽  
Micrococcus Luteus ◽  
Polymeric Coating ◽  
Tea Tree Oil ◽  
Air Filters ◽  
Air Filter ◽  
Tea Tree ◽  
Airborne Microbes

Antimicrobial air filters are required to protect humans from the risk of secondary bioaerosol pollution as well as airborne particles. Three plant extracts (tea-tree oil, rosemary, and garlic) were selected to replace antimicrobial chemicals in air filters. The antimicrobial activity of plant extracts was investigated using Micrococcus luteus and Escherichia coli. Phytochemicals present in the three plant extracts were identified using a gas chromatograph coupled with a mass spectrometer. The extracts were spray-coated on polyethylene terephthalate filter surfaces using silicate polymeric coating and evaluated via X-ray photoelectron spectroscopy and a scanning electron microscope with energy dispersive spectroscopy. After coating, an increase of 9.1% in the pressure drop was observed. The strain Micrococcus luteus was used to evaluate the antimicrobial activity of the air filter. After bioaerosol exposure, the tea-tree oil-coated filters immediately induced M. luteus cell inactivation (40–55%), whereas the rosemary and garlic coated filters did not. However, 48 h after exposure, a significant M. luteus inactivation of 99.99%, 99.0%, and 99.9% was recorded for concentrations of 2.89, 6.73, and 11.51 mg/cm2 for the tea-tree, rosemary, and garlic extracts, respectively. The coated filters exhibited high antimicrobial activity, thereby indicating significant potential for application as self-cleaning air filters.

scholarly journals Phytochemical Composition and In Vitro Antimicrobial Activity of Essential Oils from the Lamiaceae Family against Streptococcus agalactiae and Candida albicans Biofilms

Antibiotics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 592
Author(s):  
Ramona Iseppi ◽  
Roberta Tardugno ◽  
Virginia Brighenti ◽  
Stefania Benvenuti ◽  
Carla Sabia ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Essential Oils ◽  
Streptococcus Agalactiae ◽  
Reproductive Tract ◽  
Bacterial Species ◽  
Female Reproductive Tract ◽  
Retention Data ◽  
Natural Defense

The antimicrobial activity of different essential oils (EOs) from the Lamiaceae family was evaluated on Streptococcus agalactiae, Candida albicans, and lactobacilli. S. agalactiae is the main cause of severe neonatal infections, such as sepsis, meningitis, and pneumonia. C. albicans is a primary causative agent of vulvovaginal candidiasis, a multifactorial infectious disease of the lower female reproductive tract. Lactobacilli represent the dominant bacterial species of the vaginal flora and constitute the natural defense against pathogens. On the basis of the preliminary results, the attention was focused on the EOs from Lavandula x intermedia Emeric ex Loisel. and Mentha arvensis L. By using gas ghromatography (GS) retention data and mass spectra, it was possible to identify more than 90% of the total composition of the EO samples. The minimal inhibitory concentration (MIC) and anti-biofilm activity of the two EOs were determined against all isolated strains, using the EOs by themselves or in combination with each other and with drugs (erythromycin and fluconazole). The results showed a good antimicrobial and anti-biofilm activity of both EOs and a synergistic effect, leading to the best results against all the strains, resulted using the combinations EOs/EOs and antimicrobials/EOs.

scholarly journals Biocide Activity against Urinary Catheter Pathogens

2013 ◽  
Vol 58 (2) ◽  
pp. 1192-1194 ◽  
Author(s):  
Sladjana Malic ◽  
Rachael P. C. Jordan ◽  
Mark G. J. Waters ◽  
David J. Stickler ◽  
David W. Williams
Keyword(s):  
Essential Oils ◽  
Urinary Catheter ◽  
Bacterial Species ◽  
Tea Tree Oil ◽  
Planktonic Cells ◽  
Antimicrobial Effects ◽  
Tea Tree ◽  
Catheter Infection ◽  
Artificial Urine

ABSTRACTAntimicrobial effects of essential oils against bacteria associated with urinary catheter infection was assessed. Tests were performed on 14 different bacterial species cultured either planktonically or as biofilms. Biofilms were found to be up to 8-fold more tolerant of the test agents. Higher antimicrobial tolerance was also evident in tests conducted in artificial urine. Eugenol exhibited higher antimicrobial effects against both planktonic cells and biofilms than did terpinen, tea tree oil, and cineole.

Deterrency and Toxicity of Essential Oils to Argentine and Red Imported Fire Ants (Hymenoptera: Formicidae)

2007 ◽  
Vol 42 (2) ◽  
pp. 239-249 ◽  
Author(s):  
Beverly A. Wiltz ◽  
Daniel R. Suiter ◽  
Wayne A. Gardner
Keyword(s):  
Essential Oils ◽  
Argentine Ant ◽  
Fire Ants ◽  
Continuous Exposure ◽  
Tea Tree Oil ◽  
Argentine Ants ◽  
Tea Tree ◽  
Citronella Oil ◽  
Imported Fire Ants ◽  
Red Imported Fire Ants

Laboratory assays were conducted to evaluate deterrency and contact toxicity of six essential oils to the Argentine ant, Linepithema humile (Mayr), and the red imported fire ant, Solenopsis invicta Buren. In choice tests, both Argentine ants and fire ants crossed barriers treated with multiple rates of basil, citronella, lemon, peppermint, or tea tree oil less frequently than paired control barriers. Eucalyptus oil did not prevent movement of either species at any of the rates tested. In continuous exposure assays, citronella oil killed 50% of Argentine ants in 34.3 min and was the only treatment to cause 100% Argentine ant mortality after 24 h. Argentine ant mortality after 24 h was 89.8% with peppermint oil and 85.7% with tea tree oil, with the remaining treatments having mortality not significantly different from the control. Only citronella oil caused significant mortality of red imported fire ants, with 50.6% of the ants being dead after 24 h of continuous exposure.

scholarly journals Antimicrobial activity of essential oils of Juniperus phoenicea from North Western Algeria

2017 ◽  
Vol 1 ◽  
pp. 01
Author(s):  
G. Bachir Raho ◽  
M. Otsmane ◽  
F. Sebaa
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Essential Oils ◽  
Antimicrobial Activities ◽  
Dilution Method ◽  
Klebsiella Pneumonia ◽  
Variable Degree ◽  
Juniperus Phoenicea ◽  
Test Organisms ◽  
Western Algeria

Juniperus phoenicea (Family: Cupressaceae) is an evergreen tree widely distributed in North Africa including Algeria. The aim of this investigation was to analyse the antimicrobial potential of essential oils from J. phoenicea on Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia, Streptococcus sp, Bacillus sp and Candida albicans using wells and discs diffusion methods. Broth dilution method was utilized to study the minimum inhibitory concentrations (MIC) and minimum bactericidal concentrations (MBC). The results showed a variable degree of antimicrobial activity. The diameters of inhibition zones for all test organisms were in the ranges of 7–21 mm, while MIC was from 62.5 to >500µl/ml and MBC from 250 to >500µl/ml. The highest antimicrobial activities were observed against Gram positive bacteria followed by Gram negative ones then Candida albicans. The findings provide the evidence that J. phoenicea as a good medicinal plant for further investigations. 

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