Overview of Fasciola hepatica Life Cycle

Explore the life cycle of Fasciola hepatica, a parasitic trematode infecting humans and other vertebrates. Learn about its various stages including adult worms, eggs, miracidium, cercaria, and metacercaria. Understand the intricate reproductive processes involving both sexual and asexual reproduction in appropriate intermediate hosts like snails. Dive into the detailed descriptions and images showcasing the morphology and characteristics of each stage in the life cycle of Fasciola hepatica.

• Parasitic trematode
• Fasciola hepatica
• Life cycle
• Reproductive stages
• Intermediate host

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1. Trematodes Lab: 5 Fasciola hepatica

2. Adult worm in human & other vertiberates (sexual reproduction) Schistosoma Eggs in fresh water (3-7 weeks) Metacercaria (other trematodes) Miracidium (swimming free in water ) Cercaria free in fresh water Sporocyst (soft tissue of the aproprate intermediat host"snail (asexual reproduction) 1st & 2nd generation of Redia (snail)

3. Fasciola hepatica

5. Fasciola hepatica A. Adult: large and broadly- flattened, measuring up to 30 mm long and 15 mm wide. The anterior end is cone-shaped. Extensive branching of: intestinal ceca, testes and vitelline follicles.

7. Fasciola hepatica A: Adult Carmine s. Fasciola hepatica Adult 20 30 mm L. X 8 13 mm B, ( grey brown )

8. Fasciola hepatica B-Ovum Large , Single celled Unembryonated with operculum

10. Fasciola hepatica C-Miracidium Ciliated, Swimming in water Many celled.

11. Fasciola hepatica D-Redia Sac - like structure with germ cells, Clusters of germ cells differentiate into daughter redia or cercaria

12. Fasciola hepatica E. Cercaria: Anterior trunk Posterior tail, Leaving snail to swim in water.

13. Fasciola hepatica F. Metacercaria: Globose structures Encysted on aquatic vegetation.