Composition And Molluscicidal Properties Of Essential Oils From Leaves Of Xylopia Langsdorffiana A. St. Hil. Et Tul. (annonaceae)

The volatile fraction of Xylopia langsdorffiana leaves was analyzed by GC and GC/MS and tested for molluscicidal activity. With this methodology 19 different components were identified in the oil. Among them, germacrene D (22.9%), trans-β-guaiene (22.6%), β-caryophyllene (15.7%), and α-pinene (7.3%) were found to be the major constituents. The oil showed significant molluscicidal activity against Biomphalaria glabrata, with an LC90 value of 5.6 μ.g/mL, which falls below the threshold of 100 μg/mL, set for potential molluscicidal activity by the World Health Organization. © 2007 Allured Publishing Corp.193282284Lardans, V., Dissous, C., Snail control strategies for reduction of schistosomiasis transmission (1998) Parasitol. Today, 14, pp. 413-417Shuhua, X., Chollet, J., Weiss, N.A., Bergquist, R.N., Tanner, M., Preventive effect of artemether in experimental animals Infected with Schistosoma mansoni (2000) Parasital. 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Avaliação da atividade antimicrobiana de Maytenus rigida Mart. (Celastraceae) Evaluation of the antimicrobial activity of Maytenus rigida Mart. (Celastraceae)

A realização de estudos farmacológicos é fundamental para comprovar a eficácia do uso de plantas medicinais pela população para o tratamento de doenças e descobrir novos fitoterápicos. Esse estudo teve como objetivo avaliar o potencial antimicrobiano do extrato etanólico e fase acetato de etila do bom nome (Maytenus rigida Mart.) sobre Staphylococcus aureus ATCC 25923, 3 amostras de Staphylococcus aureus multirresistentes isoladas de pacientes com infecções nosocomiais, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853 e Salmonella sp. (228-R-Tet, 118-R-Sut e 01-S) isoladas de ambiente aquático, utilizando o método de difusão em agar. Os testes revelaram que o extrato e fase de M. rigida apresentaram atividade antimicrobiana in vitro frente a todas as cepas de S. aureus testadas, apresentando concentração inibitória mínima (MIC) de 400 mg mL-1. Entretanto, estes produtos não apresentaram atividade frente às linhagens de bactérias Gram-negativas testadas, Escherichia coli, Pseudomonas aeruginosa e Salmonella sp.<br>Ppharmacological studies are essential to prove the effectiveness of using medicinal plants to treat diseases and discover new phytotherapics. This study aimed to evaluate the antimicrobial potential of ethanol and ethyl acetate extracts of "bom-nome" (Maytenus rigida Mart.) against Staphylococcus aureus ATCC 25923, three samples of multiresistant Staphylococcus aureus isolated from patients with nosocomial infections, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853 and Salmonella sp. (228-R-Tet, 118-R-Sut and 01-S) isolated from water environment, using the agar diffusion test. Both extracts showed in vitro antimicrobial activity against all S. aureus strains, presenting 400 mg mL-1 minimum inhibitory concentration (MIC). However, these products did not show activity against strains of the Gram-negative bacteria Escherichia coli, Pseudomonas aeruginosa and Salmonella sp