Preliminary anti-bacterial activity of some indigenous plants of Bangladesh

Abstract

The antibacterial activity of petroleum ether, carbon tetrachloride and chloroform soluble fractions of crude methanol extracts of nine indigenous plant species of Bangladesh was evaluated by the agar diffusion method. Kanamycin (30 μg/disc) was used as a standard antibacterial agent. The results indicated that all the nine plant species (not all partitionates) exhibited moderate to potent antibacterial activity against a wide variety of gram- positive and gram-negative bacteria at a concentration of 400μg/disc. Among them the carbon tetrachloride soluble fraction of whole plant extract of Corriandrum sativum (family-Apiaceae) revealed the highest antibacterial activity against Shigella boydii with zone of inhibition of 29 mm.