Comparative studies of bactericidal activity of stem and leaf extracts of Adulsa (Justicia adhatoda L.) & Turmeric (Curcuma longa L.) against human pathogens
Varsha M. Chaudhari
Department of Microbiology, P.S.G.V.P.M’s S. I. Patil Arts, G.B. Patel Science and STKVS Commerce College, Shahada-425 409 (India) Email: varsharaj2913@gmail.com
ABSTRACT
Medicinal plants are very important because of presence of the high content of various bioactive principles and useful for the production of valuable and useful bio-products (e.g., food, cosmetics, medicines, biostimulants, biopesticides, and feed). Stem and leaf are the most important parts of medicinal plants having antimicrobial constituents. The present work was conducted to determine the bactericidal activity of stem and leaf extract of some important medicinal plants collected from the local area against some human throat pathogenic strains like Klebsiella pnumoniae, Streptococcus spp, Staphylococcus aureus, and Escherichia coli. Leaf and stem parts of the medicinal plants like Adulsa (Justicia adhatoda), and Turmeric (Curcuma longa L.) were extracted in different solvents like Ethanol, Methanol, Chloroform and water. In vitro antibacterial activity was performed by the agar disc diffusion method. The most sensitive Grampositive bacteria was found to be Staphylococcus aureus to the leaves extract of Adulsa while the most sensitive Gram-negative bacteria was Klebsiella Pnuemoniae and Escherichia coli while no inhibition was found with Streptococcus spp