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Clin Path > Cestodes, Trematodes, Acanthocephalans > Flashcards

Cestodes, Trematodes, Acanthocephalans Flashcards

1
Q

phylum platyhelminthes includes 2 classes

A

trematodes and cestodes

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2
Q

what are trematodes and cestodes

A

flatworms that lack body cavity

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3
Q

cestodes have 2 subclasses

A

eucestoda (true tapeworms) and cotyloda (pseudotapeworms)

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4
Q

life cycle of platyhelminthes

A

always indirect and need 1 or 2 intermediate hosts (arthropods, fish, mammals)

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5
Q

larval stages of some tapeworms are found in domestic animals and look like fluid filled sacs with one or more scoleces

A

bladder worms

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6
Q

what are scoleces

A

heads

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7
Q

eucestodes are…

A

multicellular but lack body cavity

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8
Q

where are eucestodes organs

A

embedded in parenchyma

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9
Q

body parts of eucestodes

A

scolex (head) with 2-4 suckers and may have snout with hooks, neck, stroblia (body) immature, mature, and gravid proglottids

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10
Q

process of gravid proglottids

A

break off stroblia and pass through host feces and new proglottids are formed from the neck

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11
Q

most common tapeworm found in sm. intestines of dogs and cats

A

Dipylidium caninum

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12
Q

prepatent period for D. caninum

A

14-21 days

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13
Q

what are found in the feces, fur, and bedding of dogs with D. caninum

A

gravid proglottids

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14
Q

what is required for an animal to get tapeworms?

A

fleas

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15
Q

dogs become infested with this sp. of tapeworms from ingesting rabbits or hares

A

Taenia pisiformis

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16
Q

dogs become infested with with this sp. of tapeworms from ingesting ruminants

A

Taenia hydatigena and T. ovis

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17
Q

feline tapeworms

A

T. taeniaeformis and Hydatigera taeniaeformis

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18
Q

tapeworms associated with unilocular and multilocular hydatid disease

A

Echinococcus granulosus and E. multilocularis

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19
Q

parts of tiny tapeworms

A

3 proglottids: one immature, one mature, one gravid

20
Q

human bladder worm that is associated with “beef measles”

A

Taenia saginata

21
Q

human bladder worm associated with “pork measles”

A

Taenia solium

22
Q

parasites of sm intestines of rodents but occasionally dogs and humans

A

Vampirolepis nana and Hymenolepis diminuta

23
Q

Spirometra sp. peudotapeworms common name

A

zipperworms

24
Q

where are zipperworms found

A

jejunum of dogs and cats in florida and along gulf

25
Q

referred to as “broad fish” tapeworms

A

Diphyllobothrium sp.

26
Q

how does Diphyllobothrium sp. reproduce

A

continually releases eggs until they shed entire uterine content

27
Q

what does Diphyllobothrium sp. ovum look like

A

egg shaped with blobs inside

28
Q

another name for flukes

A

trematodes

29
Q

what do trematodes look like

A

unsegmented and leaf like

30
Q

where are the organs in trematodes

A

embedded in loose tissue (parenchyma)

31
Q

lizard poisoning fluke of cats

A

Platynosomum fastosum

32
Q

P. fastosum ovum appearance

A

very oval, defined membrane, lots of “bubbly” looking material inside

33
Q

salmon poisoning fluke of dogs

A

Nanophyetus salmincola

34
Q

intestinal fluke of dogs and cats

A

Alaria sp.

35
Q

blood fluke that parasitizes the mesenteric veins of of the int. of dogs

A

Heterobilharzia americanum

36
Q

H. americanum ovum appearance

A

very round, nothing very defined inside

37
Q

lung fluke of dogs and cats

A

Paragonimus kellicotti

38
Q

where do lung flukes live

A

cystic spaces within lung parenchyma

39
Q

prepatent period of lung fluke

A

20-26 days

40
Q

liver fluke of ruminants

A

Fasciola hepatica

41
Q

where are liver flukes found

A

bile ducts of liver

42
Q

prepatent period of liver flukes

A

56 days

43
Q

lancet flukes of sheep, goats, and oxen

A

Dicrocoelium dendriticum

44
Q

rumen flukes

A

Paramphistomum and Cotylophoron

45
Q

blood flukes of humans

A

Schistosoma sp.

46
Q

thorny-headed worms

A

Acanthocephalans

47
Q

Acanthocephalans found in small intestines of dogs

A

Oncicola canis

Clin Path (5 decks)

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