Paper Title
Antimicrobial Activity of Some Medicinal Plants and their Qualitative Phytochemical Screening

Abstract
In this study, investigation of the antimicrobial activity of the total extracts, n-hexane, dichloromethane as well as the ethyl acetate fractions of some plants grown in Egypt including Avicennia marina (Forssk.) (Acanthaceae) Vierh., Clerodendrum phlomidis L.f. (Labiateae), Lantana camara L. (Verbenaceae) Lantana montevidensis (Spreng.) Briq. (Verbenaceae), Phyla nodiflora (L.) Greene (Verbenaceae), Tectona grandis L.f. (Labiateae) and Vitex agnus-castus L. (Labiateae) using agar well diffusion method to better consolidate the scientific basis for their traditional uses. The study was carried out against two Gram-positive and two Gram-negative bacteria together with two fungi. Among the tested plants extracts, three plant extracts including L. camara, L. montevidensis and V. agnus-castus showed significant activity against the investigated bacterial strains. The extracts and fractions showed mean inhibition zones diameter in the range of 5.99-17.76 mm with minimum inhibitory concentration values ranging between 4.88 – 2500 µg/mL against the susceptible bacteria and fungi. Qualitative phytochemical screening of plants extracts was performed to preliminary unveil the classes of secondary metabolites present in plants. The results indicated the existence of coumarins, quinones, sterols, triterpenes, carbohydrates, reducing sugars, condensed tannins, flavonoids, phenolic compounds and/or saponins in all plants.