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melaleuca alternifolia

Min Liao, Jin-Jing Xiao, Li-Jun Zhou, Yang Liu, Xiang-Wei Wu, Ri-Mao Hua, Gui-Rong Wang, Hai-Qun Cao
BACKGROUND: The cereal weevil, Sitophilus zeamais is one of the most destructive pests of stored cereals worldwide. Frequent use of fumigants for managing stored-product insects has led to the development of resistance in insects. Essential oils from aromatic plants including the tea oil plant, Melaleuca alternifolia may provide environmentally friendly alternatives to currently used pest control agents. However, little is known about molecular events involved in stored-product insects in response to plant essential oil fumigation...
2016: PloS One
Danieli Urach Monteiro, Maria Isabel Azevedo, Carla Weiblen, Sônia DE Avila Botton, Nadine Lysyk Funk, Cristiane DE Bona DA Silva, Régis Adriel Zanette, Thiago Guilherme Schwanz, Mário Luiz DE LA Rue
Cystic echinococcosis is a zoonotic disease of difficult diagnosis and treatment. The use of protoscolicidal agents in procedures is of utmost importance for treatment success. This study was aimed at analysing the in vitro and ex vivo activity of Melaleuca alternifolia oil (tea tree oil - TTO), its nanoemulsion formulation (NE-TTO) and its major component (terpinen-4-ol) against Echinococcus ortleppi protoscoleces obtained from cattle. Concentrations of 2·5, 5 and 10 mg mL-1 of TTO, 10 mg mL-1 of NE-TTO and 1, 1·5 and 2 mg mL-1 of terpinen-4-ol were evaluated in vitro against protoscoleces at 5, 10, 15 and 30 min...
October 20, 2016: Parasitology
Thirssa H Grando, Matheus D Baldissera, Lucas T Gressler, Mariângela Facco de Sá, Bruna N Bortoluzzi, Andressa S Schafer, Rafael C Ebling, Renata P Raffin, Roberto C V Santos, Lenita M Stefani, Rodrigo Vaucher, Marta L R Leal, Silvia G Monteiro
Gastrointestinal parasites are one of the biggest health problems faced in sheep, mainly due to their pathogenicity and resistance to drugs used to control these parasites. Thus, the following study aimed to assess the anthelmintic efficacy of Melaleuca alternifolia against Haemonchus contortus in gerbils (Meriones unguiculatus) experimentally infected. Three treatments were tested: M. alternifolia essential oil, popularly known as tea tree oil (TTO), a solid lipid nanocarrier made with essential oil of Melaleuca (nanoTTO), and terpinen-4-ol (terp-4-ol)...
September 16, 2016: Experimental Parasitology
Chetan Purushottam Raut, Kunal S Sethi
BACKGROUND: Conventional nonsurgical periodontal therapy has been proven to be an effective treatment for patients with chronic periodontitis. Coenzyme Q10 and tea tree oil (TTO) are known to have potential therapeutic benefits in chronic periodontitis. AIMS: The aim of the study is to compare the efficacy of Coenzyme Q10 (Perio Q(®)) and tea tree oil (Melaleuca alternifolia) gel as an adjunct to scaling and root planing in the treatment of chronic periodontitis...
July 2016: Contemporary Clinical Dentistry
Wencheng Hou, Wei Zhang, Guode Chen, Yanping Luo
Melaleuca bracteata is a yellow-leaved tree belonging to the Melaleuca genus. Species from this genus are known to be good sources of natural antioxidants, for example, the "tea tree oil" derived from M. alternifolia is used in food processing to extend the shelf life of products. In order to determine whether M. bracteata contains novel natural antioxidants, the components of M. bracteata ethanol extracts were analyzed by gas chromatography-mass spectrometry. Total phenolic and flavonoid contents were extracted and the antioxidant activities of the extracts evaluated...
2016: PloS One
Júlia de Souza Silveira Valente, Anelise de Oliveira da Silva Fonseca, Carolina Litchina Brasil, Lauren Sagave, Fernanda Cramer Flores, Cristiane de Bona da Silva, Luís Antônio Sangioni, Luciana Pötter, Janio Morais Santurio, Sônia de Avila Botton, Daniela Isabel Brayer Pereira
Pythium insidiosum is an important aquatic oomycete which can cause pythiosis in both animals and humans. This microorganism shows low susceptibility to antifungal drugs available. This study analyzed the in vitro antimicrobial activity of Melaleuca alternifolia in its free oil (FO) and nanoemulsion (NE) formulations against Brazilian P. insidiosum isolates. The antimicrobial activity evaluation was performed by the broth microdilution method according to CSLI M38-A2 document adapted to phytopharmaceuticals...
August 20, 2016: Mycopathologia
J S Valente, A O S Fonseca, L B Denardi, V S Dal Ben, F S Maia Filho, C G Zambrano, C Q Braga, S H Alves, S A Botton, D I Brayer Pereira
AIMS: The aim of this study was to investigate the in vitro susceptibility of Pythium insidiosum to combinations of the antifungal drugs terbinafine or itraconazole with Melaleuca alternifolia, Mentha piperita and Origanum vulgare essential oils (EOs). METHODS AND RESULTS: In vitro combinations of antifungal drugs with EOs were evaluated by checkerboard microdilution method against 20 Brazilian isolates of P. insidiosum. The tests were performed according to protocol M38-A2, and the interpretation of each combination result was based on the values of the fractional inhibitory concentration index...
October 2016: Journal of Applied Microbiology
Carine F Souza, Matheus D Baldissera, Rodrigo A Vaucher, Leonardo Q S Lopes, Bruno S Vizzotto, Renata P Raffin, Roberto C V Santos, Marcelo L da Veiga, Maria Izabel U M da Rocha, Lenita M Stefani, Bernardo Baldisserotto
Aeromonas hydrophila is one of the main causative agent of high mortality and significative economic losses in aquaculture and has become increasingly resistant to conventional antibiotics. One feasible alternative to control and treat it is the use of essential oils. This study aimed to evaluate A. hydrophila susceptibility to tea tree oil (TTO-Melaleuca alternifolia) in vivo, and the effect of this treatment. In vivo tests were performed using silver catfish (Rhamdia quelen) as the experimental model. Silver catfish were treated with TTO at 25 and 50 μL/L for seven days before infection...
September 2016: Microbial Pathogenesis
Wen-Ru Li, Hai-Ling Li, Qing-Shan Shi, Ting-Li Sun, Xiao-Bao Xie, Bin Song, Xiao-Mo Huang
Tea tree oil (TTO) is a yellow liquid extracted from Melaleuca alternifolia. Although the antimicrobial activity of TTO has been known for a long time, its specific antimicrobial effects and mechanism underlying these remain poorly characterized. The present study investigated the chemical composition of TTO and the dynamics and mechanism of its antimicrobial activities in two bacterial and two fungal strains. Gas chromatography-mass spectrometry analysis identified alkenes and alcohols as the main constituents of TTO...
October 2016: Applied Microbiology and Biotechnology
Wei Tsun Yim, Bhesh Bhandari, Louise Jackson, Peter James
Rhipicephalus australis (formerly Boophilus microplus) is a one host tick responsible for major economic loss in tropical and subtropical cattle production enterprises. Control is largely dependent on the application of acaricides but resistance has developed to most currently registered chemical groups. Repellent compounds that prevent initial attachment of tick larvae offer a potential alternative to control with chemical toxicants. The repellent effects of Melaleuca alternifolia oil (TTO) emulsions and two β-cyclodextrin complex formulations, a slow release form (SR) and a modified faster release form (FR), were examined in a series of laboratory studies...
July 30, 2016: Veterinary Parasitology
Jhonatan Pazinatto Boito, Roberto C Santos, Rodrigo A Vaucher, Renata Raffin, Gustavo Machado, Alexandre A Tonin, Aleksandro S Da Silva
Our research aimed to test the effects of Melaleuca alternifolia oil (pure and in nanocapsules) in the control of Rhipicephalus microplus in dairy cattle. For this purpose, the in vivo studies used 15 cows distributed in three different groups with the same number of animals. Five cows remained untreated (Group A), representing the control group; other five cows were sprayed with TTO (at 5%) in its pure form (Group B); and five cows were sprayed with nanocapsules of TTO (at 0.75%) (Group C). On days 1 and 4 post-treatments (PT), all cows had their ticks counted...
July 30, 2016: Veterinary Parasitology
Cristina Avonto, Amar G Chittiboyina, Mei Wang, Yelkaira Vasquez, Diego Rua, Ikhlas A Khan
Tea tree oil (TTO) is an essential oil obtained from the leaves of Melaleuca alternifolia, M. linariifolia, or M. dissitiflora. Because of the commercial importance of TTO, substitution or adulteration with other tea tree species (such as cajeput, niaouli, manuka, or kanuka oils) is common and may pose significant risks along with perceived health benefits. The distinctive nature, qualitative and quantitative compositional variation of these oils, is responsible for the various pharmacological as well as adverse effects...
July 18, 2016: Chemical Research in Toxicology
Júlia de Souza Silveira Valente, Anelise de Oliveira da Silva Fonseca, Laura Bedin Denardi, Vanessa Silveira Dal Ben, Fernando de Souza Maia Filho, Cristiane Telles Baptista, Caroline Quintana Braga, Cristina Gomes Zambrano, Sydney Hartz Alves, Sônia de Avila Botton, Daniela Isabel Brayer Pereira
Pythium insidiosum is the etiologic agent of pythiosis, a severe and emerging disease that affects mammals. Failure of conventional antifungal therapies is partially justified by the absence of ergosterol in the plasma membrane of this oomycete. Despite research advancement, the treatment of pythiosis has not been not fully established. The present study investigated the in vitro susceptibility profile of Brazilian isolates of P. insidiosum (n = 20) against Melaleuca alternifolia, Mentha piperita and Origanum vulgare essential oils, and their combinations...
August 2016: Mycopathologia
Adriana Pliego Zamora, Judith H Edmonds, Maxwell J Reynolds, Alexander A Khromykh, Stephen J Ralph
West Nile Virus (WNV) is a mosquito-borne flavivirus that can cause neuroinvasive disease in humans and animals for which no therapies are currently available. We studied an established combination of monoterpene alcohols (CMA) derived from Melaleuca alternifolia, against WNV infection. The in vitro results show that CMA exhibits virucidal activity, as well as reduces the viral titres and percentage of infected cells. The antiviral mechanism of action of CMA was studied. We found that CMA did not alter the intracellular pH, neither induced apoptosis, but did induce cell cycle arrest in the G0/G1-phase although that was not the antiviral mechanism...
August 2016: Virology
F J Sutili, D M Gatlin, W Rossi, B M Heinzmann, B Baldisserotto
Phytochemicals such as plant essential oils (EOs) have been reported to favour various activities in the innate immune system of fish. Thus, the aim of this study was to verify the in vitro effect of three different plant EOs (Ocimum americanum, Cymbopogon flexuosus and Melaleuca alternifolia) on non-specific immune parameters and erythrocyte osmotic fragility of red drum, Sciaenops ocellatus. Concentrations of each plant EO evaluated in preparations of head-kidney macrophages, blood leucocytes and blood plasma were as follows: 0...
December 2016: Journal of Animal Physiology and Animal Nutrition
Vanessa M Comin, Leonardo Q S Lopes, Priscilla M Quatrin, Márcia E de Souza, Pauline C Bonez, Francieli G Pintos, Renata P Raffin, Rodrigo de A Vaucher, Diego S T Martinez, Roberto C V Santos
The Pseudomonas aeruginosa is a gram-negative bacillus and frequent cause of infection. This microorganism is resistant intrinsically to various drugs. The P. aeruginosa is associated with the biofilm formation, which causes worsen the prognosis and difficulty the treatment. The influence of Melaleuca alternifolia oil or "tree of tee" oil (TTO) and TTO nanoparticles on adhesion of P. aeruginosa in buccal epithelial cells was investigated. Also was determined the antimicrobial and antibiofilm activity against this microorganism...
April 2016: Microbial Pathogenesis
Ruth A Sabroe, Catherine R Holden, David J Gawkrodger
BACKGROUND: Essential oils are fragrance substances that are labelled on cosmetic products by their INCI names, potentially confusing consumers. OBJECTIVES: To establish whether contact allergy to essential oils might be missed if not specifically tested for. METHODS: We tested 471 patients with 14 essential oils and 2104 patients with Melaleuca alternifolia oil between January 2008 and June 2014. All patients were tested with fragrance mix I, fragrance mix II, hydroxyisohexyl 3-cyclohexene carboxaldehyde, and Myroxylon pereirae...
April 2016: Contact Dermatitis
G M R Valladão, S U Gallani, C V Ikefuti, C da Cruz, N Levy-Pereira, M V N Rodrigues, F Pilarski
In vitro effect of the Melaleuca alternifolia, Lavandula angustifolia and Mentha piperita essential oils (EOs) against Ichthyophthirius multifiliis and in vivo effect of M. alternifolia for treating ichthyophthiriasis in one of the most important South American fish, Piaractus mesopotamicus (Holmberg), were evaluated. The in vitro test consisted of three EOs, each at concentrations of 57 μL L(-1) , 114 μL L (-1) , 227 μL L(-1) and 455 μL L (-1) , which were assessed once an hour for 4 h in microtitre plates (96 wells)...
October 2016: Journal of Fish Diseases
Matheus D Baldissera, Thirssa H Grando, Carine F Souza, Lucas T Gressler, Lenita M Stefani, Aleksandro S da Silva, Silvia G Monteiro
This study aimed to evaluate the susceptibility in vitro and in vivo of Trypanosoma evansi to terpinen-4-ol, γ-terpinene and α-terpinene, the three main compounds of tea tree oil (Melaleuca alternifolia) with known efficacy in the treatment of trypanosomosis. In vitro, a trypanocidal effect of terpinen-4-ol, γ-terpinene, and α-terpinene was observed when used alone or associated at 0.5, 1 and 2% concentrations i.e., the α-terpinene showed a faster trypanocidal effect when compared to chemotherapy (diminazene aceturate - D...
March 2016: Experimental Parasitology
Anna Herman, Krzysztof Tambor, Andrzej Herman
The high concentrations of essential oils are generally required to receive microbial purity of the products (cosmetics, medicine). On the other hand, their application due to the high concentration of essential oils may be limited by changes in organoleptic and textural quality of the products, as well as they cause irritation and allergies in users. Addition of linalool to essential oil may significantly enhance its antimicrobial effectiveness and reduce their concentrations in products, taking advantage of their synergistic and additive effects...
February 2016: Current Microbiology
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