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The morphological appearance of E. revolutum.a The metacercarial stage show five clearly visible corner spines (arrowhead) and large excretory granules (arrow). b The collar head of E. revolutum presents two alternating rows, consisting of thirty-seven collar spines. c Adult stage of E. revolutum, which was obtained from the experimental hamster 18 days after infection. d The well-developed cirrus (arrowhead) located in the cirrus sac (arrow) near the acetabulum
