Cestodes Flashcards

1
Q

true or false: all vertebrate have at least one species of tapeworm

A

true

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2
Q

true or false: there are over 1000 named species of cestodes

A

true

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3
Q

cestodes are also known as ….

A

tapeworms

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4
Q

there are two species of taenia that are of interest. this includes taenia _____ and taenia _____

A

saginata, solium

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5
Q

true or false: the scolex of t. saginata and t. solium do not look different

A

false

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6
Q

what is different about the scolex of t. saginata vs. solium?

A

the scolex of t. solium include rostellum that have two rows of hooks, however t. saginata lacks rostellum

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7
Q

both taenia scolecies have ___ suckers

A

4

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8
Q

true or false: t. solium and t. saginata can also be distinguished by looking at their _______

A

proglottids

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9
Q

the proglottid of t. saginata has more _______ branching

A

uterine

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10
Q

t. saginata has more than __ branches, while t. solium has ___-__ branches

A

13, 7-13

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11
Q

true or false: the proglottids of taenia are longer than they are wide

A

true

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12
Q

true or false: each proglottid has male/female reproductive systems. when they get old, they are unable to absorb nutrients and they are full of eggs, so the proglottid is passed in feces.

A

true

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13
Q

true or false: the eggs of taenia species are also a key distinguishable feature

A

false! the eggs of taenia species cannot be told apart.

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14
Q

when taking care of taenia eggs, the person in charge of processing the specimen must be very careful! why is this?

A

ingestion of taenia solium eggs can lead to cysticercosis

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15
Q

if there are hooks in the egg, that means it is a ______ egg

A

tapeworm

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16
Q

where does copulation occur in each proglottid?

A

the genital pore

17
Q

when the uterus is filled with eggs and ready to go out in the world, it is known as a ____ proglottid

A

gravid

18
Q

is it worse to ingest t. solium eggs or cysticerci?

A

eggs! leads to cysticerci, but eating cysticerci leads to adult worms which shed eggs in the stool

19
Q

true or false: for t. saginata, no cysticerci form in humans, only beef muscle holds cysticerci

A

true

20
Q

true or false: cysticerci can also form in subcutaneous tissues

A

true

21
Q

is this pathway correct: eat undercooked cysticerci –> protoscolex develop into tapeworm

A

yes

22
Q

name ways to prevent tapeworm

A
  1. cook food thoroughly
  2. stop coprophagia (esp. pigs eating feces)
  3. prevent pig access to human toilets
  4. praziquantel for humans