Zakaria Y El Astal, Abd Elrahiem A Ashour, Abd Almalik Kerrit.
Antimicrobial activity of some medicinal plant extracts in Palestine.
Pak J Med Sci Jan ;21(2):187-93.

Objectives: To evaluate the antimicrobial activity of aqueous, ethanolic, methanolic and phenolic extracts from three Palestinian folkloric medicinal plants in addition to their commercial oils against ten pathogenic microorganisms. Methods: The plants studied were sage, thyme and parsley. Five concentrations of leaf extract of each of the three plants were prepared. The antimicrobial effect of each concentration was measured. Results: Aqueous extracts of sage and thyme had action against most of the tested microorganisms. Phenolic extract of sage and thyme showed antibacterial activity against Staph. aureus and Enterococcus sp, respectively. On the other hand, E. coli was more affected by the ethanolic extract of parsley. While, that extract does not elicit pronounce effect on the tested Gram positive organisms. The results of commercial oils of sage, thyme and parsley displayed no antimicrobial activity against E. coli, Proteus mirabilis and Salmonella typhi. Conclusion: The data obtained revealed that, among the 10 tested microorganisms, Staph. aureus was, in general, the most susceptible microbe to most extracts of the three plants studied.

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