11. Taenia saginata and bovine cysticercosis Flashcards
(15 cards)
What is the definitive host (FH) for Taenia saginata?
Human
Taenia saginata primarily infects humans as the definitive host.
What is the intermediate host (IH) for Taenia saginata?
Ruminant (muscle, liver, kidney)
The intermediate host for Taenia saginata is typically cattle.
What is the size range of Taenia saginata?
4-10 m length
Taenia saginata is the largest species of Taenia.
How many proglottids does Taenia saginata typically have?
1000 – 2000 proglottids
This large number of proglottids contributes to its reproductive capacity.
Describe the morphology of Taenia saginata.
Four suckers, no hooks or rostrellum
This lack of hooks distinguishes it from other Taenia species.
What are the characteristics of Taenia saginata eggs?
Small, spherical/rounded, 3 thick shells, embryonated with oncosphere inside, brown/grey
The eggs resemble ‘mini toxocara’ in appearance.
What is the life cycle of Taenia saginata?
Eggs passed in feces → IH ingests contaminated grass → Oncospheres hatch → Circulate to muscles → Develops to cysticercus bovis → FH ingests raw meat → Cysticercus matures in SI
The cycle involves both the definitive and intermediate hosts.
What clinical signs may be observed in humans infected with Taenia saginata?
Diarrhea, abdominal pain, asymptomatic, nausea, anorexia
Symptoms can vary from mild to severe.
What is a potential pathogenesis associated with cysticercus bovis?
Cysticercus bovis resides in muscle
Myocarditis can occur as a result of infection.
What are the treatment options for Taenia saginata infection in humans?
Niclosamide + Praziquantel
These medications are effective against adult tapeworms.
What are some control measures for preventing Taenia saginata infection?
Good sanitation, cook meat well, freezing at <5 degrees for more than 4 days, water management, meat inspection at slaughterhouses
These measures help reduce transmission.
What diagnostic method can be used for Taenia saginata in humans?
Flotation with Breza
This method helps identify eggs in fecal samples.
Fill in the blank: Gravid proglottids are shorter in T. _______ than in T. saginata.
solium
This distinction is important for differentiating between species.
What is the survival time of Taenia saginata eggs in the environment?
1 year
This longevity increases the risk of transmission.
What are some clinical signs of myocarditis associated with Taenia saginata infection?
Tachycardia, tachypnoea, diarrhea
These signs indicate a more severe systemic involvement.
