14. The group that infects its host by direct penetration into the skán is a. Sc

Question

14. The group that infects its host by direct penetration into the skán is a. Scitosomatidae b. Fasciolidae c. Echinostomatidae d. Opisthorchiidae 15. Which of the following is in order in the development sequence of the trematodes a. egg, cercairia, sporocyst, metacerearia b. miracidium, egg, cercaria, sporocyst e. egg, miracidium, cercaria, redia, metacercaria d. egg, miracidium, sporocyst, redia, cercaria 16. The infetive stage in the life cycle Diphyllobothrium latum is a. the embrionated egg b. procercoid c sporocyst d. plerocercoid 17. The infective stage in the life cycle of Dircrocoelium dendriticum is a. metacercaria b. coracidium c. cercaria d. sporocyst. 18. The common name for Opisthorchis sinensis is a. sheep liver fluke b. lancet fluke c. human liver fluke d. human lung fluke 19. Paragonimus westerman is a. human lung fluke

Explanation / Answer

Answer 14

Option A is correct i.e "schistostomatidae".

In the question option A is misprinted, it should be schistostomatidae.

The larvae, lives in water and has the ability to directly penetrate the skin of the host.

Answer 15

Option D is correct i.e "egg, miracidium, sporocyst, redia, cercaria".

Trematodes are parasitic flatworm that use vertebrates as their definitive host and molluscs as their intermediate host. To perform this trematodes have varied life cycle stages.

Answer 16

Option D is correct i.e "plerocercoid".

After ingestion of copepod by minnow or freshwater fish (intermediate host), procercoid larvae are released from crustacean and reaches the fish's flesh and here it develops into plerocercoid larvae and plerocercoid larvae is the infective stage for humans (definitive host).

Answer 17

Option A is correct i.e "metacercaria".

Cercaria that are released from snail (intermediate host), become metacercaria (infective stage) after eaten by ants. Human host becomes infected after ingestion of infected ants.

Answer 18

Option C is correct i.e "Human liver fluke".

Because Opisthorchis sinensis lives in liver of humans. The fluke itself does not damage the liver but it is greatly damaged due to its migration of fluke through biliary system

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