The only intermediate host required in the life cycle of blood flukes is a:
a. copepod.
b. crustacean.
c. freshwater snail.
d. freshwater fish.
C
Blood flukes differ in morphologic and life-cycle characteristics from the other trematodes; however, because they all belong to the same genus, they are similar and may be difficult to dis-tinguish from each other. They do, however, require a freshwater snail as the only intermediate host.
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