Biology 546
Human parasitology laboratory tutorial

The adult trematode on the left was one of several dozen removed from the intestinal tract of a middle-aged Oregon fisherman who was undergoing intestinal surgery for another matter. The worms were very tiny, measuring slightly less than 2 mm in length. What species do they represent?

Clonorchis sinensis
Dicrocoelium dendriticum
Fasciola hepatica
Nanophyetus salmincola

Original; photograph by S. J. Upton

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Kansas State University | Biology Division