Helminth Flashcards

HELMINTHS WIKIBUGS FLASHCARDS

Cestodes

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 Hymans = most are in the liver, with some in the lungs and a few elsewhere	Link to Answer Article
Summarise complex metamorphosis and give an example of a species of insect which uses it	Larva emerges from egg Larva grows and moults Larva pupates Adult emerges from pupa Flies	Link to Answer Article