Antimicrobial Activity of Medicinal Herbs in vitro against Fish Pathogen, Aeromonas hydrophila

Abstract

This study evaluates the potency of aqueous and ethanolic decoction (individual extract) and concoction (mixed extract) of three common medicinal herbs i.e. Curcuma longa, Ocimum sanctum and Azardirachta indica to inhibite the in vitro growth of A. hydrophila. Among the decoctions A. indica exhibited the most potent antibacterial property against A. hydrophila. Among the concoctions both the aqueous and ethanolic tri-herbal extracts mixed in the ratio of 1 : 1 : 1 have the highest antibacterial activity even at the lowest concentration than the other concoctions and decoctions.