Antimicrobial activity of leaf extracts of Eupatorium triplinerve Vehl. against some human pathogenic bacteria and phytopathogenic fungi

Abstract

Petroleum ether, carbon tetrachloride, chloroform, and ethyl acetate extracts of Eupatorium triplinerve Vehl. leaves were investigated for their antimicrobial activities against 11 human pathogenic bacteria and six phytopathogenic fungi. The crude extracts showed good activity against the organisms tested herein. The chloroform extract exhibited the largest zone of inhibition (22 mm in diam with 1000 μg/disc extract) against Vibrio and the highest inhibition of fungal radial mycelial growth (73.5% with 100 μg extract/ml medium) against Colletotrichum corchori. The chloroform extract exhibited the lowest MIC against Vibrio (250 μg/ml) and C. corchori (62.5 μg/ml). It appeared that E. triplinerve could be a potential natural source of new antimicrobial agent.   

Key words: Antimicrobial activity, Leaf extract, Eupatorium triplinerve

doi:10.3329/bjb.v37i1.1570

Bangladesh J. Bot. 37(1): 89-92, 2008 (June)