In vitro amoebicidal activity of Origanum syriacum and Origanum laevigatum on Acanthamoeba castellanii cysts and trophozoites

► Most drugs in clinical use have toxic side effects and require long courses of administration. ► Most of the plants have been remained unexplored for their antiparasitic activities. ► Turkey especially has an important area for the biologically active plant species. ► This is the first report evaluating the antiparasitic potentials of Origanum syriacum and Origanum laevigatum.