Abstract :
Six plants were purchased from herpelists shopes local. These extracts are the Punica granetum; Artemisia campestris; Eucalyptus camaldulensis; Cuminum cyminum; Mangifera indica; and Achillea santolina. The serial double fold dilution was done to each extract in sterile labeled tubes after preparation. The stock solutions used were (2000, 1000, 500, 125, 62.5, 31.5) mgml. Metronidazole (flagyl) was used as standard drug at concentration of 5ml125mg. The concentrations tested were (500, 250, 125, 62.5, 31.5, 15.75, 7.87) mg5ml. Viability was assessed by number of viable parasite; number of dead parasite per-microscopically field. The results showed that punica granetum; Artemisia campestris; Eucalyptus camaldulensis; and Achillea santolina revealed significant decreases in number of Giardia lamblia trophozoites. While the Cuminum cyminum and Mangifera indica not appeared remarkable effects in number of Giardia Lamblia trophozoites.