Trematodes (extra) Flashcards
1
Q
What is this?
A
Fasciola hepatica egg
120-150 microns in length
- oval in shape
- yellow brown in colour
- operculum at one end (barely visible)
2
Q
What is this?
A
Fasciola hepatica egg
120-150 microns in length
- oval in shape
- yellow brown in colour
- operculum at one end (barely visible)
- miracidia within the egg
3
Q
What is this?
A
Opisthorchis egg
27-30 microns
- flask-shaped
- yellow-brown
- developing miracidia inside
- operculum at one end with shoulders either side
4
Q
What is this?
A
Paragonimus westermanni egg
70-95 microns. ‘Oriental lung fluke’
- asymmetric
- yellow-brown
- operculum
- unsegmented ovum and mass of yolk cells
infection in humans by eating inadequately cooked or pickled crab or crayfish that harbor metacercariae
first intermediate host is a snail
5
Q
What is this?
A
Schistosoma mansoni
6
Q
What is this?
A
Schistosoma haematobium
