Appearance and relative sizes of stool ova and parasites

(1) Hookworm egg; (2) whipworm egg (Trichuris trichura); (3) Taenia egg; (4) Entamoeba histolytica cyst; (5) Giardia lamblia cyst; (6) infertile Ascaris lumbricoides egg; (7) red blood cells; (8) Schistosoma mansoni egg.

Courtesy of Harriet Provine.

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