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Abstract
The chemical composition of the essential oil obtained by hydrodistillation of Pistacia vera L. gum was analyzed using Gas Chromatography-Mass Spectrometry (GC-MS). Twenty compounds were identified, representing 99.5% of the total components. α-Pinene, β-pinene, and α-thujene were found to be the major constituents. The bacteriostatic activity of the essential oil against 12 clinical isolates of Helicobacter pylori was determined using the hole-plate method. All isolates were sensitive to the essential oil, and the Minimum Inhibition Concentration (MIC) was 1.55 mg/ml for all isolates using the agar dilution method.