Abstract

The aim of this study was to compare the antimicrobial activity of essential oils and extracts of Salvia officinalis, Thymus vulgaris, Mentha piperita, Juniperus communis and Rosmarinus officinalis with antibiotics against physiological and pathological strains of microorganisms isolated from the oral cavity. The antibacterial and antifungal activities of essential oils, extracts and antibiotics were evaluated using the disc diffusion method. Essential oils exhibited higher inhibitory activity against physiological microflora and all tested pathogenic microorganism strains than those observed for antibiotics and plant extracts. Essential oils and ethanolic extracts of Thymus vulgaris were the most potent growth inhibitor of all microorganisms isolated from the oral cavity. Depending on the bacterial strain tested, Thymus vulgaris oil had 3–8 times higher inhibitory activity compared with all tested antibiotics and exhibited the same strength of antifungal activity as amfotericin and miconazol against Candida albicans. Essential oils and extracts may be useful in the prevention and treatment of oral diseases caused by oral microorganisms.

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