fasciola hepatica
DESCRIPTION
FASCIOLA HEPATICA. FASCIOLA hepatica. Disease : Fascioliasis & liver rot in animals. Distribution: - Common in cattle & sheep raising countries. FASCIOLA hepatica. Definitive host : man Reservoir host: Cattle, sheep ,goats, buffaloes Habitat: Bile ducts. - PowerPoint PPT PresentationTRANSCRIPT
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FASCIOLA HEPATICA
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FASCIOLA hepatica
Disease:Fascioliasis & liver rot in animals.
Distribution:- Common in cattle & sheep raising
countries.
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FASCIOLA hepatica
Definitive host : man
Reservoir host: Cattle, sheep ,goats, buffaloes
Habitat: Bile ducts.
Intermediate host: Lymnaea snails.
Infective stage : Encysted metacercaria.
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Mode of infection
Ingestion of raw vegitation or water containing encysted metacercaria.
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Life cycle:
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Adult FASCIOLA Hepatica
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Egg:
•Size : 140 X 70 µm.
•Shape: Oval, Thin walled with
operculum.
• Color : Yellowish brown (bile stained).
•Contents : Ovum & yolk cells
(immature).
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Miracidium
•Pyriform.
•Ciliated.
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Lymnaea snails
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Cercaria (Leptocercus)Last larval stage inside the
snail.
No sexual organs.
Cystogenous glands (help in passing out of snail & in encysting on vegetations or water).
Tail: simple & helps in leaving the snail.
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Encysted MetacercariaWithout tail.
Surrounded by a
cyst
wall.
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Clinical Picture :Fever. Pain & tenderness in right hypochondrium.Biliary colics.Hepatomegaly,Jaundice.Vomiting & diarrhoea. Toxaemia.Anaemia & eosinophilia.
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Diagnosis
I. Clinically : A highly suggestive tetrad of:
Fever. Hepatomegaly. Pain & tenderness in the right
hypochondrium. Eosinophilia.
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Diagnosis
II- Laboratory : a. Direct methods 1. Stool examination by direct smear &
concentration methods to find the characteristic eggs.
2. Bile aspiration from the duodenum & examine for eggs.
3. US.4. Computerized tomography (C.T).
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Diagnosis
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Diagnosis
b. Indirect Methods
ELISA, IHA ,CIEP Eosinophilia.
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Thank You