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Type: Artigo de periódico
Title: Activity Of Essential Oils From Brazilian Medicinal Plants On Escherichia Coli.
Author: Duarte, Marta Cristina Teixeira
Leme, Ewerton Eduardo
Delarmelina, Camila
Soares, Andressa Almeida
Figueira, Glyn Mara
Sartoratto, Adilson
Abstract: Essential oils obtained from leaves of 29 medicinal plants commonly used in Brazil were screened against 13 different Escherichia coli serotypes. The oils were obtained by water-distillation using a Clevenger-type system and their minimal inhibitory concentration (MIC) were determined by microdilution method. Essential oil from Cymbopogon martinii exhibited a broad inhibition spectrum, presenting strong activity (MIC between 100 and 500 microg/mL) against 10 out of 13 Escherichia coli serotypes: three enterotoxigenic, two enteropathogenic, three enteroinvasive and two shiga-toxin producers. C. winterianus inhibited strongly two enterotoxigenic, one enteropathogenic, one enteroinvasive and one shiga-toxin producer serotypes. Aloysia triphylla also shows good potential to kill Escherichia coli with moderate to strong inhibition. Other essential oils showed antimicrobial properties, however with a more restricted action against the serotypes studied. Chemical analysis of Cymbopogon martinii essential oil performed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC-MS) showed the presence of compounds with known antimicrobial activity, including geraniol, geranyl acetate and trans-cariophyllene, which tested separately, indicated geraniol as antimicrobial active compound. The significant antibacterial activity of Cymbopogon martinii oil suggests that they could serve as a source for compounds with therapeutic potential.
Subject: Acetates
Anti-infective Agents
Chromatography, Gas
Escherichia Coli
Gas Chromatography-mass Spectrometry
Medicine, Traditional
Microbial Sensitivity Tests
Oils, Volatile
Plant Leaves
Plant Oils
Plants, Medicinal
Rights: fechado
Identifier DOI: 10.1016/j.jep.2006.11.034
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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