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The study was conducted to investigate the cysts and eggs of intestinal parasites in drinking water in four models of drinking water for water purification projects in Al-Najaf Al-Ashraf Governorate for the period from 1/10/2017 to 1/10/2018. The results of the examination of river water in four districts in Al-Najaf Al-Ashraf governorate showed the presence of five species of parasites are cysts of Entamoeba histolytica by 39%, and the eggs of the Ascaris worm by 12%, worm Ancylostoma duodenale by 4%, Giardia lamblia cysts 40%, and the eggs of Enterobius vermicularis by 18%. The results of the tap water examination showed that there were five types of intestinal parasites, but at a lower rate than in river water, Entamoeba histolytica cysts by 16%, eggs of Ascaris by 7%, Ancylostoma duodenale eggs by 2%, Giardia lamblia cysts by 29%, and Enterobius vermicularis by 5% overall.
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