Assertion: tapeworm's egg | /r/HasProperty | mistaken for trematode eggs
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Direct microscopic examination of fecal samples or fecal flotation may reveal the eggs of Spirometra mansonoides, which are sometimes mistaken for trematode eggs, although they are larger and possess an operculum that is often difficult to see.