The World Health Organization ranks diarrheal disease as the second (after acute respiratory infections)most common cause of morbidity and mortality in children in the developing world. Entamoeba histolytica and Giardia lamblia are two of the most important and most widespread diarrhea-related parasitic protozoain the world. Metronidazole is used as a drug of choice against amoebiasis and giardiasis. We know that humans have used medicinal plants for several thousands of years to treat illness and health disorders. An alternative to synthetic drugs is the search for anti-parasitic plant...