The first intermediate host for all the trematodes is which of the following?

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Question:  The first intermediate host for all the trematodes is which of the following? A   Fish B   Snail C   Shrimp D   Water plant Answer:  Snail  
Class Trematoda Description
Common Name ·        Trematodes ·        Flukes
Habitat Found in the digestive, respiratory or circulatory systems of vertebrate hosts and often in mollusks as intermediate hosts.
Body Shape ·        Flat, leaf-shaped ·        Non-segmented body
Life Cycle ·        Eggs ·        Miracidia ·        Sporocysts ·        Rediae ·        Cercariae ·        Metacercariae
Infestation Infection occurs through ingestion or penetration by cercariae.
Intermediate Hosts The first intermediate host is often a mollusk (e.g., snail)
Host Range ·        Humans ·        Domestic animals ·        Wildlife
Pathogenicity Some trematodes can cause diseases in humans and animals, leading to symptoms like organ damage, anemia and inflammation.
Examples ·        Schistosoma spp ·        Fasciola hepatica ·        Clonorchis sinensis
Prevention Sanitation and snail control
Treatment Chemotherapy with antiparasitic drugs
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