Antimicrobial activity of essential oil from the rhizomes of Amomum rubidum growing in Vietnam

Abstract

Bearing in mind the lack of scientific studies focused on the biological activity of essential oil from Amomum rubudum, this work was designed to validate the antimicrobial property ascribed to this traditional species. Essential oil was extracted from the air-dried and pulverized rhizomes of A. rubidum by hydrodistillation in an all glass Clevenger-type apparatus. The antimicrobial activity was established by the method of microdilution broth susceptibility assay. A. rubidum essential oil displayed inhibitory action against Escherichia coli (ATCC 25922) and Fusarium oxysporum (ATCC 48112) with Minimum inhibitory concentration (MIC) values of 50 mg/mL. The antimicrobial activity of A. rubidum rhizome essential oil was being reported for the first time. Overall, the results herein presented sustain and strengthen the antimicrobial property traditionally ascribed to A. rubidium.