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Question

Which one of the following is an actively swimming free-living and non-feeding stage of liver fluke?

A
Sporocyst
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B
Redia
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C
Cercaria
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D
Metacercaria
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Solution

The correct option is C Cercaria
  • Cercaria: a free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.
  • Sporocyst: a parasitic fluke in the initial stage of infection in a snail host, developed from a miracidium.
  • Redia. : a larva produced within the sporocyst of many trematodes that produces another generation of larvae like itself or develops into a cercaria.
  • metacercaria. : a tailless encysted late larva of a digenetic trematode that is usually the form which is infective for the definitive host.

So, the correct answer is 'Cercaria'.


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