Cestodes Flashcards
[4] The body consist of the following:
- Scolex
- Neck
- Proglottids
- Strobila
[3] Classifications of segments.
- Immature
- Mature
- Gravid
[2] Larval forms
- Solid
- Bladder
[2] Solid larvae
- Procercoid
- Plerocercoid
Relatively globular with the scolex invaginated into solid body and with cercomere.
[solid larvae]
Procercoid
Elongated with the scolex free or may be invaginated into the neck.
[solid larvae]
Plerocercoid
[4] Bladder type of larvae
- Cysticercoid
- Cysticercus
- Echinococcus
- Coenurus
w/ small anterior body into which the scolex is invaginated and frequently with a solid and elongated caudal portion.
[bladder]
Cysticercoid
w/ a head invaginated into a proximal portion of the large bladder. Contains single scolex only.
[bladder]
Cysticercus
w/ germinal epithelium where smaller cyst originate each of which contains small scolices.
[bladder]
Echinococcus
w/ germinal epithelium from where the protoscolices arise.
[bladder]
Coenurus
Producing passive obstruction, migration to unusual sites and competition with the nourishment of the host.
[stage of development]
Adult stage
More likely serious because larvae may be lodged in critical foci such as the brain, eyes or elsewhere and may grow to large masses producing pressure defects on adjacent structures.
[stage of development]
Larval stage
Common name of Taenia saginata.
Beef tapeworm
Common name of Taenia solium
Pork tapeworm