Trematode Flukes (Echinostoma revolutum)

The digenetic trematode Echinostoma revolutum is an endoparasitic helminth having a wide variety of hosts including ducks, geese, pigeons, chickens, and humans. With part of its life history spent in water bodies, these members of the phylum Platyhelminthes (flatworms) use freshwater snails as their primary hosts and frogs or snails as their secondary intermediate hosts.