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RUSVM Parasit SPR 2020 > CESTODES: Cyclophillidea spp. > Flashcards

CESTODES: Cyclophillidea spp. Flashcards

1
Q

What types of intermediate hosts are required for D. caninum, Choanotaenia spp., Raillietina spp., Anoplocephala spp., and Moniezia spp.?

A

Arthropods (flea, lice, orbatid mites, beetle, ants)

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2
Q

What are some common traits associated with cestodes?

A
  • Indirect life cycle
  • Hermaphroditic
  • No alimentary canal, flat-bodied
  • Scolex and Strobila
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3
Q

What is the predilection site for cestode adult infections?

A

Small intestine

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4
Q

True or False: Cestodes are zoonotic.

A

False, only some are

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5
Q

What are the two orders of Class Cestoda?

A

Cyclophyllidea and Psuedophyllidea

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6
Q

How many IH’s are required for species that are members of Order Pseudophyllidea?

A

2

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7
Q

What order of cestodes has a scolex with suckers?

A

Order Cyclophyllidea

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8
Q

What structure provides a very distinguishing feature between the oncospheres of orders Cyclophyllidea and Pseudophyllidea?

A

Cilia are present on the oncospheres of Pseudophyllidea spp.

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9
Q

What structure is present for the attachment of Pseudophyllidea spp. to the host?

A

Bothria

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10
Q

What structure is present within each proglottid segment, and allows for the passage of from the female repro tract of the proglottid?

A

Genital pore

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11
Q

What composes the body or strobila of the tapeworm?

A

Scolex, neck and proglottid segments

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12
Q

What types of IH’s are required for Taenia and Echinococchus spp.?

A

Mammals

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13
Q

What IH’s are associated with Mesocestoides spp.?

A

Reptiles and small mammals

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14
Q

Which cestode larval stage is associated with arthropod IH’s of Order Cyclophyllidea?

A

Cysticercus

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15
Q

What is the common name for Diplyidium caninum?

A

Dog tapeworm, flea tapeworm, cucumber tapeworm

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16
Q

Who are the IH’s and DH’s of Diplydium caninum?

A

IH = Fleas, lice

DH = Dogs, cats, people

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17
Q

How many genital pores are associated with the D. caninum?

A

2 per proglottid

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18
Q

What species of flea serves as the IH for the flea tapeworm, as it contains the cystercircoid that is infective to humans?

A

Ctenocephalides spp.

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19
Q

Macroscopic identification, but also a ______ _______ ____ test, can be used to identify D. caninum.

A

Scotch adhesive tape test

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20
Q

Are adult species of D. caninum pathogenic?

A

No

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21
Q

Both Choanotaenia and Raillietina spp. infect what species, what is their predilection site?

A

Domestic and wild fowl, and the small intestine

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22
Q

While the adult Choanotaenia spp. are ____________ unless in large numbers, while the __________ spp. result in chronic infections can lead to reduced growth and weakness.

A

Non-pathogenic

Railliietina spp.

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23
Q

What disease is associated with heavy infections of Raillietina spp.?

A

Nodular tapeworm disease

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24
Q

True or False: Necropsy and fecal examinations can be used regularly to diagnose infections of Choanotaenia spp.

A

False, eggs are not often found as they don’t freely float in fecal examinations

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25
Q

What is present on adult Anoplocephala perfoliata tapeworms, to distinguish it from Anoplocephala magna?

A

Lappets

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26
Q

What predilection site is associated with the adult infection of A. perfoliata?

A

Terminal ileum and cecum

27
Q

What is the predilection site associated with A. magna?

A

Small intestine

28
Q

What occurs as a result of haevy infections of A. perfoliata?

A

Ulceration, ill health, obstruction, and intussusseption

29
Q

Who are the IH’s and DH’s of A. perfoliata and A. magna?

A

IH: Orbatid mites
DH: Equids

30
Q

What tests can be associated with the diagnosis of Anoplocephala spp.?

A

Fecal flotation and centrifugation, Sedimentation test, ELISA

31
Q

How pathogenic are A. magna?

A

Not very

32
Q

What is the common name for Moniezia spp.?

A

Milk tapeworm

33
Q

Who are the IH’s and DH’s of Moinezia spp.?

A

IH: Orbatid mites

DH: Livestock

34
Q

Which of the following is associated with the scolex of Moinezia spp.?

A) A bothrium and teeth
B) Unarmed with suckers
C) Teeth and suckers
D) Cutting plates and bothria

A

B) Unarmed with suckers

35
Q

What species of cestodes do these eggs belong to?

A

Moinezia spp.

36
Q

What cestode species is present in this equine fecal exam?

A

Anoplocephala spp.

37
Q

What species are associated with the cestode species seen in this fowl fecal sample?

A

Choanotaenia and Raillietina spp.

38
Q

You perform a fecal and realize it was mislabeled. What species are associated with producing the following egg?

A

Dogs, cats (also people)

39
Q

Taenia spp. are associated with predominantly what larval stage?

A

Cysticercus

40
Q

What larval stage is associated with Taenia taeniaeformis?

A

Strobilocercus

41
Q

Taenia spp. are associated with infecting the _____ _______ as adults, and are largely non-pathogenic.

A

Small intestine

42
Q

What species are associated with the infection of dogs and foxes?

A
  • Taenia pisiformis*
  • Taenia crassiceps*
  • Taenia hydatigena*
43
Q

You observe the following eggs in a canine fecal example. From what you learned, this hunting dog has been used for hares. What species is this?

A

Taenia pisiformis

44
Q

You observe Taenia spp. eggs in a dachsund’s fecal. A PE showed that there appears to be retinal infiltration and as well as ascites from an ultrasound. What species is this?

A

T. crassiceps

45
Q

After speaking with an owner about his sheepdogs fecal sample, he says that he has tapeworms. When he asks you specifically what kind they are, you tell him -?

A

Taenia hydatigena

46
Q

What Taenia species is associated with infecting cats through strobilocercus in small rodents, which serve as an IH?

A

Taenia taeniaformis

47
Q

Meat inspection can be used to ensure that what larval stage will not be consumbed by people for T. saginata and T. solium?

A

Cysticercus

48
Q

Where will T. saginata be found in its larval stage in cattle?

A

Striated muscle (cardiac and skeletal)

49
Q

Will the IH experience any clinical signs with T. saginata infection?

A

None, unless there are heavy infections with cyticerci in the heart

50
Q

Is T. saginata or T. solium zoonotic?

A

Taenia solium

51
Q

Explain how T. solium is associated with the causing neurocytsicercosis in humans?

A

People eat contaminated, uncooked swine meat, or via poor hygiene and lack of sanitation (if shared from person to person)

52
Q

True or False: Taenia solium eggs, like all Taenia spp., appear the same allowing for it to be spread easily, contaminating the soil and water supply.

A

True

53
Q

When humans ingest T. solium and T. saginata where will larval stages migrate to?

A
  • Taenia solium:* Muscle and brain
  • Taenia saginata:* Muscle
54
Q

What sites of infection are associated with T. solium?

A

IH: Muscles, eye, brain, SQ tissue

FH: Small intestine

55
Q

True or False: Taeniosis, caused by Taenia solium, is the single most infectious cause of seizures in some areas of the United States where more than 1000 people are diagnosed with it each year.

A

False, neruocysticercosis (NCC) not taeniosis

56
Q

Echinococcus granulosus is associated with what IH’s and FH’s?

A

IH: livestock, especially sheep

FH: Dog ands canids

57
Q

Where is the larval stage of Echinococcus granulosus found during infection of the IH?

A

Liver, lungs, bones, brain, and other organs

58
Q

Echinococcus spp. are associated with what larval stage?

A

Hydatid cyst

59
Q

True or False: Hydatids are only pathogenic in people, and not in dogs or livestock.

A

True

60
Q

Who are the IH’s and FH’s associated with Echinococcus canadensis?

A

IH: People and wild cervids
FH: Dogs and canids

61
Q

Echinococcus multilocularis cause what disease in people?

A

Alveolar echinococcosis

62
Q

Hydatid cysts are associated with what organs in IH’s of people and animals infected with E. multilocularis?

A

Liver, but also other organs as well

63
Q

True or False: Only one species of the Echinococcus spp., E. multilocularis, is zoonotic.

A

False, E. multilocularis, E. granulosus, and E. canadensis are all zoonotic

64
Q

What is meant by E. granulosus and E. canadensis being unilocular?

A

Each hydatid cyst produce a single oncosphere

RUSVM Parasit SPR 2020 (25 decks)

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