Examination of feces is commonly used to diagnose parasitic infections as many parasites live in the intestinal tract. When collecting stool specimens, wide-mouthed leak-proof containers should be used and handled carefully to avoid infection. Multiple specimens collected on alternate days within 10 days are examined microscopically, looking for parasites like Entamoeba histolytica trophozoites and cysts, Giardia lamblia cysts, and eggs of worms such as Ascaris lumbricoides and Trichuris trichura under saline and iodine mounts. The morphology and features of common intestinal parasites can be observed with these microscopic examination techniques.