BIO2: Common Cestode Infections Flashcards
What are the 4 cestode parasites?
- Taenia solium
- Taenia saginata
- Echinococcus granulosus
- Echinococcus multilocularis
T.solium + T.saginata are _____.
Cestodes
Segmented flatworms = no alimentary canal + needs to be absorb through the body
Humans = only host for T.saginata, T.solium + T.asiatica
- Infection through eating raw/undercooked meat
Distinguish the scolex morphology of the different Taenia
- T.solium = 4 large suckers + rostellum
- T.saginata = 4 large hookers
- T.asiatica = rudimentary hooklets in a wart-like formation
Describe Taenia Proglottid morphology
Proglottids = single segments of a tapeworm
Proglottids behind scolex are immature + become thicker as they mature
Each mature proglottid has female + male reproductive organs (hermaphrodites)
Mature, gravid proglottids detach + passed within faeces
What are the symptoms of taeniasis?
- Few symptoms or none when adultworms are in intestines
- Non-specific infections = obstruction, diarrhea, hunger pains, weight loss
- Appendicitis
- Most common complaint: discomfort + embarrassment caused by proglottids crawling from anus
Name each feature of the Taenia anatomy
Which Taenia causes taeniasis?
Which Taenia causes cysticercosis?
What is the treatment of taeniasis + cysticercosis?
What is niclosamide ineffective against?
What species of echinococcus can be pathogenic in humans?
Describe life cycle of Echinococcus
How is Echinococcus transmitted?
What are the symptoms of cystic echinococcus?
What are they symptoms of alevolar echinococcus?
