Trematodes

Question 1

What is the common name for trematodes

Answer 1

Flat worms, flukes

Question 2

What is the infectious stage of most flukes

Answer 2

Metacercaria

Question 3

What is the IH for most flukes

Answer 3

Snail, either aquatic or land

Question 4

What is the egg morphology of most flukes

Answer 4

Operculated eggs

Question 5

How to most flukes damage their hosts

Answer 5

Suck blood via oral sucker and acetabulum, damage tissue/organs due to migration block flow with egg accumulation

Question 6

How do you dx most flukes infections

Answer 6

Egg detection via sedimentation

Question 7

What is the scientific name of the Liver Fluke?

DH:
IH:
Habitat:
Infectious stage:
Lifecycle:

Answer 7

Fasciola hepatica

DH: cattle,sheep, goats
IH: snail
Habitat: bile duct
Infectious stage: metacercaria

General life cycle: operculated eggs shed in feces-miracidium hatch in environment (water)-penetrate IH snail-develops in snail (sporocyst,redia,Cercaria) - Cercaria leave snail - shed tail and encyst = metacercaria - ingested by DH - excyst and travel through liver to bile duct - mature and shed eggs