Medicinal Plants Essay

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Journal of Ethnopharmacology 62 (1998) 173 – 182 Short communication Screening of 34 Indian medicinal plants for antibacterial properties R. Perumal Samy, S. Ignacimuthu *, A. Sen Entomology Research Institute, Loyola College, Chennai 600 034, India Received 22 October 1997; received in revised form 25 March 1998; accepted 26 March 1998 Abstract A total of 34 plant species belonging to 18 different families, selected on the basis of folklore medicinal reports practised by the tribal people of Western Ghats, India, were assayed for antibacterial activity against Escherichia coli, Klebsiella aerogenes, Proteus 6ulgaris, and Pseudomonas aerogenes (Gram-negative bacteria) at 1000 – 5000 ppm using the disc diffusion method. Of these 16 plants showed activity; among them Cassia fistula, Terminalia arjuna and Vitex negundo showed significant antibacterial activity against the tested bacteria. Our findings confirm the traditional therapeutic claims for these herbs. © 1998 Elsevier Science Ireland Ltd. All rights reserved. Keywords: Antibacterial activity; Plant extract; Tribals; Western Ghats 1. Introduction In India, herbal medicines have been the basis of treatment and cure for various diseases/physiological conditions in traditional methods practised such as ayurveda, unani and siddha. Although reports of antibacterial activity of indigenous plants have been published from many regions (Nadkarni, 1908; Dhar et al., 1968) they have not been systematically conducted, except in a few * Corresponding author. cases, thereby leading to confusion in drawing a meaningful conclusions (Padmaja et al., 1993; Ndamba et al., 1994; Vijaya et al., 1995). Indian folk medicine comprises numerous herbal prescriptions for therapeutic purposes which may be as varied as healing wounds, treating inflammation due to infection, skin lesions, leprosy, diarrhoea, scabies, venereal

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