Antibacterial potential of some indigenous plants against human pathogenic bacteria.
The antibacterial activities of the extracts of Albizia lebbeck (seeds), Eriobotrya japonica (leaves), Zingiber zerumbet (rhizomes), Mirabilis jalapa (leaves and stems), Oroxylum indicum (bark), Cinnamomum camphora (twigs), Mesua ferrea (seeds), Phyllanthus fraternus (seeds and leaves), Piper longum (fruits) and Pongamia pinnata (seeds) from Sonitpur, Assam, India, were evaluated against Gram positive and Gram negative bacteria (Staphylococcus aureus, Klebsiella pneumoniae, Proteus vulgaris and Pseudomonas aeruginosa). The methanol extracts of A. lebbeck, Z. zerumbet and O. indicum, and petroleum ether extracts of Phyllanthus fraternus and Piper longum were effective against K. pneumoniae. The A. lebbeck extract was the most active against K. pneumoniae. The methanol extracts of E. japonica, Mirabilis jalapa, O. indicum and C. camphora, and petroleum ether extracts of Mesua ferrea were effective against S. aureus. The extract of Pongamia pinnata showed significant inhibitory activity against Pseudomonas aeruginosa.