Ch 46 Cestodes Flashcards

1
Q

What phylum do cestodes, trematodes, and acanthocephalans belong to?

A

Phylum Platyhelminthes

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2
Q

What are true tapeworms classified as?

A

Eucestoda

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3
Q

What are pseudotapeworms classified as?

A

Cotyloda

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4
Q

What are acanthocephalans commonly known as?

A

Thorny-headed worms

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5
Q

What type of life cycle do tapeworms have?

A

Always indirect

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6
Q

What are the possible intermediate hosts for tapeworms?

A
  • Arthropods
  • Fish
  • Mammals
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7
Q

What is the head of a true tapeworm called?

A

Scolex

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8
Q

What are the segments of the body in true tapeworms called?

A

Proglottids

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9
Q

What is the term for the body of a true tapeworm?

A

Strobila

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10
Q

What do gravid proglottids do?

A

Break off and pass out of the body

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11
Q

What does each egg of a true tapeworm contain?

A

A fully developed embryo

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12
Q

What structure do pseudotapeworms use for attachment?

A

Bothria

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13
Q

What is the prepatent period for Dipylidium caninum?

A

14 to 21 days

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14
Q

Which tapeworm is most common in the small intestine of dogs and cats?

A

Dipylidium caninum

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15
Q

How do dogs become infected with Taenia pisiformis?

A

By ingesting rabbits and hares

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16
Q

What is the zoonotic potential of Echinococcus spp.?

A

Associated with unilocular and multilocular hydatid disease

17
Q

What are the two types of tapeworms found in humans?

A
  • T. saginata (beef tapeworm)
  • T. solium (pork tapeworm)
18
Q

What type of trematodes are only parasitic in domestic animals?

A

Digenetic trematodes

19
Q

What is the liver fluke of cattle, sheep, and other ruminants?

A

Fasciola hepatica

20
Q

What are the two muscular attachment organs in trematodes?

A
  • Anterior sucker
  • Ventral sucker
21
Q

What do acanthocephalans lack?

A

A true gut

22
Q

Fill in the blank: Tapeworms have an _______ life cycle.

23
Q

True or False: Eucestodes and Cotyloda are both types of tapeworms.

24
Q

What is the function of the scolex in tapeworms?

A

Attachment organ

25
Where are mature proglottids found in a true tapeworm?
Close to the body
26
What is the name of the lung fluke of dogs?
Paragonimus kellicotti
27
What is the blood fluke associated with dogs?
Heterobilharzia americanum
28
What is the basic structure of trematodes?
Unsegmented and leaflike
29
What type of fluke is Platynosomum fastosum?
Lizard poisoning fluke of cats
30
What unique characteristic do mature proglottids of pseudotapeworms have?
Separate along the long axis for a short distance