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vol.17 número4  suppl.2Diversidade e usos de plantas medicinais nos quintais da comunidade de São João da Várzea em Mossoró, RN índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Plantas Medicinais

versão impressa ISSN 1516-0572versão On-line ISSN 1983-084X

Resumo

BRITO, D.I.V. et al. Phytochemical analysis and antifungal activity of the essential oil of Lippia sidoides Cham. and of the Thymol against Candida strains. Rev. bras. plantas med. [online]. 2015, vol.17, n.4, suppl.2, pp.836-844. ISSN 1516-0572.  http://dx.doi.org/10.1590/1983-084X/14_060.

The resistance of the Candida against drugs has been a challenge to the discovery of new substances with antimicrobial or modulatory effects that could be used against the cadidiasis. This work evaluated the antifungal activity of the essential oil of Lippia sidoides Cham. and of the Thymol against Candida strains. The products were tested towards 16 strains of Candida using the diffusion method, which allowed to select the strains in order to proceed with the research. The strains of Candida krusei (CK LMBM 01, CK LMBM 02), Candida albicans (CA LM 62) and Candida tropicalis (CT LM 20) were assayed by the microdilution method so that the Minimal Inhibitory Concentration (MIC) and the Minimal Fungicide Concentration (MFC) could be determined. The morphogenesis of the Candida was evaluated using poor environment in order to observe morphological changes. The composition of the essential oil was determined by GC-MS. The main compound observed was the thymol (84.95%). The MIC of the essential oil of L. sidoides and Thymol ranged between 64 to 256 μg/mL, and between 32 to 64 μg/mL respectively. The MFC of the essential oil and the thymol varied between 128 to 512 μg/mL and 64 to 128 μg/mL respectively. The morphogenesis of different Candida strains was inhibited in the MIC and MICx2 to the essential oil and thymol. The results indicated the antifungal potential of the L. sidoides and of the Thymol due to the inhibition of the invasive capacity, one of the most important virulence factors for the candidiasis` development. These results are promising to new researches about the phytochemical, toxicological and pharmacological aspects of the essential oil of L. sidoides and its phytochemical compounds.

Palavras-chave : Lippia sidoides; thymol; antifungal activity; inhibition of virulence.

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