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In this study the composition and antimicrobial properties of essential oils obtained from Origanumonites, Mentha piperita, Juniperus exalsa, Chrysanthemum indicum, Lavandula hybrida,Rosa damascena, Echinophora tenuifolia, Foeniculum vulgare were examined. To evaluatethe in vitro antibacterial activities of these eight aromatic extracts; their in vitro antimicrobialactivities were determined by disk diffusion testing, according to the NCCLS criteria. Escherichiacoli (ATTC 25922 ), Staphylococcus aureus (ATCC 25923) and Pseudomonas aeruginosa(ATTC 27853 were used as standard test bacterial strains. Origanum onites recorded antimicrobialactivity against all test bacteria, and was strongest against Staphylococcus aureus. ForRosa damascena, Mentha piperita and Lavandula hybrida antimicrobial activity was recordedonly to Staphylococcus aureus. Juniperus exalsa, and Chrysanthemum indicum exhibited antibacterialactivities against both Staphylococcus aureus and Escherichia coli. We also examinedthe in vitro antimicrobial activities of some components of the essential oils and foundsome components with antimicrobial activity.