Antimicrobial Activities of Essential Oil and Methanol Extract of Teucrium montanum

This study was designed to examine the chemical composition of essential oil and the in vitro antimicrobial activities of essential oil and methanol extract of Teucrium montanum. The inhibitory effects of essential oil and methanol extracts of T. montanum were tested against 13 bacterial and three fungal species by using disc-diffusion method. GC/MS analyses revealed that essential oil contains mainly delta-cadinene (17.19%), beta-selinene (8.16%) alpha-calacorene (4.97%), 1,6-dimethyl-4-(1-methylethyl)-naphthalene (4.91%), caryophyllene (4.35%), copaene (4.23%), torreyol (3.91%), 4-terpineol (3.90%), cadina-1,4-diene (3.39%), beta-sesquiphellandrene (3.34%), tau-cadinol (3.12%) and gamma-curcumene (3.18%). The essential oil has antibacterial as well as antifungal effect.