Cestodes

Question 1

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

Answer 1

true

Question 2

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

Answer 2

true

Question 3

cestodes are also known as ….

Answer 3

tapeworms

Question 4

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

Answer 4

saginata, solium

Question 5

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

Answer 5

false

Question 6

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

Answer 6

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

Question 7

both taenia scolecies have ___ suckers

Answer 7

4

Question 8

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

Answer 8

proglottids

Question 9

the proglottid of t. saginata has more _______ branching

Answer 9

uterine

Question 10

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

Answer 10

13, 7-13

Question 11

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

Answer 11

true

Question 12

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.

Answer 12

true

Question 13

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

Answer 13

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

Question 14

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

Answer 14

ingestion of taenia solium eggs can lead to cysticercosis

Question 15

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

Answer 15

tapeworm

Question 16

where does copulation occur in each proglottid?

Answer 16

the genital pore

Question 17

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

Answer 17

gravid

Question 18

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

Answer 18

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

Question 19

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

Answer 19

true

Question 20

true or false: cysticerci can also form in subcutaneous tissues

Answer 20

true

Question 21

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

Answer 21

yes

Question 22

name ways to prevent tapeworm

Answer 22

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