SCREENING OF PLANT EXTRACTS FOR ANTIMICROBIAL ACTIVITY AGAINST BACTERIA

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February, 2014, vol. 3, special issue 1 (Microbiology)
pages: 177-180
Article type: Microbiology of Microbiology
Abstract: The aim of this study was antimicrobial action of the methanolic extracts of Equisetum arvense L. and Urtica dioica L. against gramnegative and grampositive bacteria. The antimicrobial activities of the extracts against gramnegative bacteria: Escherichia coli CCM 3988, Listeria ivanovii CCM 5884, Listeria innocua CCM 4030, Pseudomonas aeruginosa CCM 1960, Serratia rubidaea CCM 4684 and grampositive bacteria: Brochothrix thermosphacta CCM 4769, Enterococcus raffinosus CCM 4216, Lactobacillus rhamnosus CCM 1828, Paenobacillus larvae CCM 4483 and Staphylococcus epidermis CCM 4418 were determined by the disc diffusion method and the microbroth dilution method according to CLSI. Probit analysis was used in this experiment. Of the 2 plant extracts tested, all extracts showed antimicrobial activity against one or more species of microorganisms. The most antimicrobial activity showed methanolic plant extract of E. arvense against S. epidermis with disc diffusion method and with microbroth dilution method against S. rubidaea and plant extract Urtica dioica with disc diffusion method against P. aeruginosa and with microbroth dilution method against S. rubidaea and E. coli.
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