| Question
|
Answer
|
Article
|
| Fill in the missing words about cestodes
|
A cestode (tapeworm) is a chain (strobila) of progressively maturing reproductive units called proglottids anchored at one end to the intestinal wall by a hold-fast organ called the scolex.
|
Link to Answer Article
|
| What species of Taenia occur in dogs?
|
- Taenia ovis
- Taenia hydatigena
- Taenia pisiformis
- Taenia multiceps
- Taenia serialis
|
Link to Answer Article
|
| What are the more obvious morphological features of the scolex of a cyclophyllidean tapeworm?
|
- Four suckers
- Rostellum with rows of large hooks
- Unsegmented neck (behind the scolex) which gives rise to new segments
|
Link to Answer Article
|
| Describe the features of a cysticercus
|
- Fluid filled bladder, containing a single invaginated head (protoscolex) - seen as a white blob on the wall of the cyst
|
Link to Answer Article
|
| In which host(s) would you expect to find the cysticercus of T. hydatigena and where in the host might it be found?
|
- Sheep (mostly)'
- Cattle
- Pigs
- Found in the peritoneal cavity
|
Link to Answer Article
|
| What is the difference between a coenurus and a cysticercus?
|
- A coenurus is a fluid filled bladder with multiples (dozens) of inverted head attached to the wall
- Whereas the cysticercus has only a single inverted scolex.
|
Link to Answer Article
|
| How does the distribution of hydatid cysts differ in sheep, horses and humans?
|
- Sheep = most are in the lungs with smaller numbers in the liver
- Horses = nearly all are in the liver
- Humans = most are in the liver, with some in the lungs and a few elsewhere
|
Link to Answer Article
|
| What tapeworms occur in the cat?
|
- Taenia taeniaeformis
- Dipylidium
|
Link to Answer Article
|
| Why is it so difficult to prevent many cats from becoming re-infected with T. taeniaeformis?
|
- The intermediate hosts are mice and other small mammals that are hunted
|
Link to Answer Article
|
