Page 29 - MNU-PM503 Parasitology practical book

Pharm D- Clinical Pharmacy Program Third Level Parasitology and virology (PM503)

Fasciola hepatica rediae Fasciola egg

Definitive host - Sheep, cattle (pig) and man.

Intermediate host - The snail Lymnea truncatula in case of F.

hepatica and L. cailaudi in case of F. gigantica

Infective stage - Encysted metacercaria

Mode of transmission - Ingestion of aquatic plants or drinking water

containing encysted metacercaria

Site of localization - Bile duct

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Laboratory diagnosis:

1- Microscopic examination: for demonstration of operculated egg or the adult

worm in stool specimen, duodenal or biliary aspirate.

2- Serology: using ELISA (Enzyme Linked Immunosorbent Assay) to

detect antibodies in sera.

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