Trematodes (extra) Flashcards by Gemma Whyatt

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)

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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

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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

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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

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Q

What is this?

A

Schistosoma mansoni

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Q

What is this?

A

Schistosoma haematobium

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