Fasciola hepatica Flashcards
1
Q
Fasciola hepatica is a food-borne zoonosis (T/F)
A
True
2
Q
What are the definitive hosts for Fasciola Hepatica?
A
- Humans
- Sheep
- Cattle (widespread morbidity/mortality)
3
Q
What are the intermediate hosts for Fasciola hepatica?
A
Primary: snail
Secondary: Grass, i.e. watercress
4
Q
How is Fasciola hepatica transmitted?
A
- Eating raw grasses with metacercaria
- to snails by infected feces in water
5
Q
Fasciola hepatica is also known as what?
A
Liver fluke
6
Q
What is the life cycle of Fasciola hepatica?
A
- Similar as other trematodes;
- Cercaria released by snails attach to grasses and is ingested by definitive host
- Metacercaria migrate to liver and become adult fluke in host
7
Q
What are the clinical symptoms of Fasciola hepatica ingestion (young fluke)?
A
- Damage liver
- Severe headache
- backache
- chills
- fever
8
Q
What are the clinical symptoms of Fasciola hepatica ingestion (adult fluke)?
A
- via bile ducts cause atrophy of portal vessels, hemorrhage
- enlarged cirrhotic liver accompanied by diarrhea and anemia indicate advanced stage
- Secondary conditions may be fatal
9
Q
How does one directly diagnose Fasciola hepatica?
A
Detection of eggs in stool
10
Q
What is the treatment for Fasciola hepatica?
A
- Triclabendazole (only trematode)
- can give herbivores Anthelmintics but costly
11
Q
How does one control fasciola hepatica?
A
- Dec available snail habitats
- limit herbivore/snail contact
- reduce contamination of pasture by using tractors
