Antibacterial activity of Ethyl Acetate extract from Sideritis montana L.Species

Antibacterial activity of Sideritis montana L. was detennined for ethyl acetate extract from whole plant. Sideritis montana L. (Lamiaceae) is the annual species with low branched trunk, up to 40 cm high. Inhabits sand arid meadows and rocky in the Europe and the Mediterranean. Sideritis montana was collected in July 2008, from the region of Suva Planina Mt. in eastern Serbia. Antimicrobial activity of extract was tested by microdilution method and minimum inhibitory (MIC) and microbicidal concentrations (MBC) were determined. The tested extracts showed significant antibacterial activity against species of the genus Bacillus (MlC 0.625 mg/ml, MBC 1.25 mg/ml) and Staphylococcus aureus (MIC 1.25 mg/ml, MBC 5 mg/ml) while showed moderate and limited antibacterial activity against pathogenic Escherichia coli, Pseudomonas aeruginosa, Enterococus faecalis, Proteus mirabilis and Salmonella enterica