Journal of Pure and Applied MicrobiologyVol. 2 No. 2

Antimicrobial Activity of Leaf and Root Ethanol Extracts of Selected Indian Medicinal Plants Against Lower Respiratory Tract Human Pathogenic Microorganisms

S. Madhavan1* and K. Saritha2

1PG & Research Department of Microbiology, Sengamala Thayaar Educational Trust Women’s College, Mannargudi - 614 001, India. 2Department of Microbiology, Sri Venkateshwara College of Arts and Science, Peravurani - 614 804, India.

Received on 09 July 2008 and accepted on 12 September 2008



Antimicrobial activity of the leaf and root extracts of Indigofera tinctoria Linn., Wrightia tinctoria Br. and Rungia repens Nees. against human pathogenic bacteria and fungi were evaluated. The ethanol extracts of these plants were evaluated for antimicrobial activity against human pathogenic bacteria such as Escherichia coli, Pseudomonas aeruginosa, Proteus mirabilis and pathogenic fungi such as Aspergillus niger, Aspergillus flavus and Aspergillus fumigatus. Ethanolic leaf and root extracts were prepared and based on the susceptibility of the test organisms were determined. It was found that ethanolic extracts showed high inhibition zone than control experiments.

Keywords : Antimicrobial activity, medicinal plants, ethanol extract, human pathogens.