Chemical composition and in vitro antibacterial properties of essential oils of four Thymus species from organic growth

The agar disk diffusion assay, T. zygis and T. capitatus EOs showed inhibitory effects against the ten tested bacteria, while T. matichina and T. vulgaris had inhibitory effects against eight and seven tested bacteria, respectively. T. zygis and T. capitatus EOs had higher inhibition halos against all tested bacteria, at higher concentration (40 μL), than T. matichina and T. vulgaris EOs. The microdilution assay, T. mastichina EO had a MIC values ranging between 3.75 and 7.5 μL/mL. Whilst in the case of T. zygis, T. capitatus and T. vulgaris EOs the MIC values ranged between 1.87 and 7.5 μL/mL.