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Phytochemical Constituents and Inhibitory Activity towards Methicillin‐Resistant Staphylococcus aureus Strains of Eryngium Species (Apiaceae)

The chemical composition of the essential oils of Eryngium campestre, E. thorifolium, and E. creticum (Apiaceae), growing in the Aegean region of Turkey (Mount Sandras, Denizli), was determined by direct thermal desorption (DTD)‐GC/MS analyses. A total of 49 components were identified in the oils, α‐pinene and hexanal being the major compounds. The three essential oils were also tested for their inhibitory activity of nine different methicillin‐resistant Staphylococcus aureus (MRSA) strains by the agar disc diffusion method. The anti‐MRSA activity of E. thorifolium oil, the most active of the three oils, was comparable with those of the reference antibiotic vancomycin and oregano oil, although somewhat lower.