Trachyspermum copticum (Apiaceae) is an annual plant which grows in Iran. The fruits of T. copticum (Ajwain) traditionally were used as diuretic, carminative, and antihelmentic. Some biological effects of Ajwain such as antiviral, antifungal and antioxidant activities have been confirmed. The objective of the present investigation was toevaluate the antibacterial activity of e...