Abstract
The medicinal plants indicated multiple health advantageous properties and have antimicrobial (bacteria and fungi) effects. Moreover, the extracts of these plants are less harmful to the environment, low cost, and their use indicate their low toxicity to humans. The aim of this study was to evaluate the effectiveness of the ethanolic extracts of three famous medicinal plants Mentha piperita, Mentha lon-gifolia, and Ocimum basilicum from Ranyah distinct, KSA (about 2000 meters above level sea) against six pathogenic bacteria and sex pathogenic fungi. This evaluation was carried out through biofilm estimation and membrane filter estimation. The obtained results indicated that the pathogenic bacteria; Streptococcus pneumoniae, Listeria monocytogenes, Klebsiella pneumoniae, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were affected by all extracts of the tested plants especially with high concentration of 100%. In the same manner, the pathogenic fungi; Candida albicans, Aspergillus niger, Aspergillus ochraceus Aspergillus flavus, Penicillium funiculosum, and Penicillium ochrochloron were strongly affected by M piperita, M. longifolia, and O. basilicum extracts. It could be concluded that the ethanolic extracts of these medicinal plantswhich collected from high altitude region showed high activities on pathogenic bacteria and fungi. Therefore, it can recommend that these medicinal plants could be usefull as herbalmedicinal treatment after the pharmaceutical preparations.