Pak. J. Bot., 43(SI): 1-7, 2006.

Back to Contents	Pak. J. Bot., 43(SI): 169-174, December, 2011	FREE FULL TEXT PDF	Back to Contents
			Updated: 03-12-11
	*ANTIMICROBIAL POTENTIALS OF ECLIPTA ALBA* BY WELL DIFFUSION METHOD** JEHAN BAKHT¹, AMJAD ISLAM¹ AND MOHAMMAD SHAFI² Abstract:* The susceptibility of nine microbial species to an antimicrobial extract from Eclipta alba was screened using the well diffusion assay. Three different volumes (24, 30 and 36 µl/well) were tested. Analysis of the data revealed that all extracts from Eclipta alba showed antimicrobial activities. An N-butanol fraction showed inhibitory activities against all nine microbial species. Samples extracted with petroleum ether, dichloromethane, methanol or water had varying levels of inhibition against some of these microorganisms. The most resistant microbial strain was Salmonella typhi when tested against petroleum ether, dichloromethane, methanol and water extracted samples. The most susceptible Gram-positive bacterium was Bacillus subtilis, which was inhibited by all six extracts from Eclipta alba, while the most resistant Gram-positive bacterium was Bacillus cereus. Erwinia carotovora was the most susceptible Gram-negative bacterium, while Salmonella typhi and Escherichia coli were highly resistant among the Gram-negative bacteria. ¹Institute of Biotechnology and Genetic Engineering KPK Agricultural University Peshawar Pakistan ²Department of Agronomy KPK Agricultural University Peshawar Pakistan

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