In-vitro Antibacterial Activity of Extracts obtained from Azadirachta indica A. Juss. (Meliaceae), Catharanthus roseus (L.) G. Don (Apocynaceae) and Curcuma longa L.

eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 December 2007 3 2 185 188 juc 661 article In-vitro Antibacterial Activity of Extracts obtained from Azadirachta indica A. Juss. (Meliaceae), Catharanthus roseus (L.) G. Don (Apocynaceae) and Curcuma longa L. Shazia Siddiqui 1 S.S. Khan 2 A.H. Ansari 2 Department of Microbiology, Saifia College of Science of Education, Bhopal - 462 001 (INDIA Department of Chemsitry, Saifia College of Science and Education, Bhopal - 462 011 (INDIA) Three medicinal plants viz Azadirachta indica A. Juss, Catharanthus roseus (L) G. Don and Curcuma longa L. were tested for their antibacterial efficacy against Staphylococcus aureus and Klebsiella pneumoniae via extracts obtained from soxhlation using petroleum ether, benzene, acetone and ethanol as solvents. The in-vitro antibacterial activity was performed by disc diffusion method. Among these extracts, ethanol has been found to be effective one. The ethanolic extract of all the plants were more active against both the bacterial pathogens. Maximum zone of inhibition 15 mm was recorded in Azadirachta indica. A. Juss against Staphylococcus aureus whereas it was 14 mm against Klebsiella pneumoniae showing that it is the most effective plant extract among the three plants used.   https://journalofchemistry.org/paper/661/ Klebsiella pneumoniae antibacterial activity