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