Ripa, Farhana AlamSadia, Sayma2025-08-142025-08-1420252025-05ID 20346064http://hdl.handle.net/10361/26548Cataloged from PDF version of thesis.Includes bibliographical references (pages 36-40).This thesis is submitted in partial fulfillment of the requirements for the degree of Bachelor of Pharmacy, 2025.Polyalthia suberosa is a medicinal plant known for its traditional use in treating inflammation, pain, and infections. Traditionally, it has been used in South and Southeast Asian medicine to treat fever, wounds, and gastrointestinal disorders, highlighting its therapeutic potential. The present study was conducted to find out the the phytochemical constituents and antimicrobial effect of the methanolic extract of leaves of P.suberosa (MPSL). The phytochemical screening was performed following the standard method. Antimicrobial activity was tested against 5 pathogenic bacteria (Bacillus cereus, Bacillus subtilis, Escheichia coli, Klebsiella peunomoniae, Pseudomonas aeruginosa) by the Disk diffusion method. Alkaloids, tannins, flavonoids, saponins, glycosides, phenolic compounds, steroids and resin were some of the chemical constituents identified during phytochemical screening. The plant showed moderate antimicrobial activity against tested microorganisms. Although the experimental extract showed antimicrobial activity against the tested pathogenic microbes. Therefore, the MPSL extract can be used as a new source for the development of novel antimicrobial drugs. However, further investigation is required to find out the responsible phytoconstituents for the aforementioned activity.41 pagesenBRAC University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.Antimicrobial activityPolyalthia suberosaPhytochemical screeningDisk diffusion methodMethanol extractPlant extractsHerbs--Therapeutic use.Anti-infective agents.Medicinal plants.Phytochemicals--Therapeutic use.Thesis