Taenia saginata Flashcards
Is Taenia Saginata a zoonosis?
Yes
What category of parasite does Taenia Saginata fall under?
Cestode
What are the definitive hosts for Taenia Saginata?
Human
What are the intermediate hosts for Taenia Saginata?
Cattle (larval stage)
What is the geographical distribution of Taenia Saginata?
global
Describe the morphology of Taenia Saginata.
- Scolex has suckers
- NO HOOKS
- Uterus has large number of lateral branches that become full of eggs. Eggs have a hardened outer shell (embryophore) containing the infective larva (oncosphere).
- Tapeworm lives in the small intestine eggs in muscle at predilection site in cows. No multiplication in numbers
How is Taenia Saginata transmitted?
-hosts eat undercooked beef
Describe the first step of the Taenia Saginata life cycle.
- Humans shed tapeworm proglottid in feces with thousands of eggs.
Regarding the Taenia Saginata life cycle, what happens once humans shed tapeworm proglottid in feces with thousands of eggs?
-Cattle ingest eggs from grazing.
Regarding the Taenia Saginata life cycle, what happens after cows ingest eggs from grazing?
-Eggs hatch and penetrate capillaries, migrate to muscle.
Regarding the Taenia Saginata life cycle, what happens after Taenia Saginata becomes logged in the muscle of cows?
- People eat under cooked beef and become infected with larva.
- Parasite migrates to gut, grows to large size, takes nutrients from gut through tegument.
- People pass proglottids in feces
Can oncosphere from cow with Taenia Saginata infect humans?
No
What are the clinical symptoms of Taenia Saginata?
Usually asymptomatic (no malnutrition)
How would once directly diagnose Taenia Saginata?
Detection of proglottid (segmented body) in feces
What is the treatment for Taenia Saginata?
Praziquantel
