Antimicrobial Properties of Various Extracts of Andrographis neesiana Wight - An Endemic Medicinal Species from India

In the present study deals with the antimicrobial properties of the Andrographis neesiana were tested against five human bacterial pathogens by using five various solvent namely, ethanol, methanol, acetone, chloroform and petroleum ether. The maximum antimicrobial activity was noted in petroleum ether extracts of stem showed activity against Escherichia coli (16mm) and the minimum was recorded in ethanol stem extracts against Staphyloccoccus aureus (2mm), Klebsiella pneumonia (2mm) and Proteus vulgaris (3 mm). The maximum antimicrobial activity recorded in chloroform leaves extracts against Klebsiella pneumonia (12mm). The minimum activity was noted in acetone leaves extracts against Staphylococcus aureus (2mm) and Psudomonas aeruginosa (3mm). The stem extract showed more inhibitory effect than the leaf extracts. The results of our antimicrobial assay revealed that plant extracts showed inhibitory activity against the tested organisms.