Microscopy

Eggs of Fasciolopsis buski are broadly ellipsoidal, operculated and measure 130-150 µm long by 60-90 µm wide.  The eggs are unembryonated when passed in feces.  The eggs of F. buski can be difficult to distinguish from Fasciola hepatica, although the abopercular end of the latter often has a roughened or irregular area.

A	B

A, B: Eggs of F. buski in unstained wet mounts.

Adults

Adults of F. buski measure 20-75 mm long and have poorly-developed oral and ventral suckers.  Adults reside in the intestine of the mammalian host.

C	D

C: Adult fluke of F. buski.  Image contributed by Georgia Division of Public Health.
D: Adult fluke of F. buski.