A 4-year-old child has been complaining of a stomachache and has had intermittent episodes of diarrhea.Physical examination reveals an apparently healthy child with a mildly distended abdomen.Because of the diarrhea, a fecal sample is sent for culture and for O&P.What is the identity of that found in the child's fecal sample?

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The usual diagnostic stage is the egg.Fertile Ascaris eggs are oval, measure 45 to 75 by 35 to 50 mm, and have thick hyaline walls surrounding a one-cell-stage embryo.Most eggs have a brown, bile-stained mammillated outer layer.CDC PHIL #410

A 4-Year-Old Child Has Been Complaining of a Stomachache and Has