Abstract

• Three selected medicinal plants grown in Pathein were collected on June, 2019. These plants are Clitoria ternatea L. (Aung-me-nyo) belonging to Fabaceae, Melastoma malabathricum L. (Say-oboke) belonging to Melastomataceae and Enhydra fluctuans Lour. (ka-na-hpaw) belonging to Asteraceae. The fresh samples of these plants except flowers were air-dried and powdered for extraction. The powder of each plant (5 g) was extracted with 50 mL of acetone, ethanol, methanol and water on water-bath at 80℃. These extracts were tested the antimicrobial activity on eight different test organisms using the paper disc diffusion assay method. According to their antimicrobial activity, the ethanol extract of Enhydra fluctuans Lour. (20.74 mm of inhibitory zone) was selected for further investigation.