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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
What is present on adult *Anoplocephala perfoliata* tapeworms, to distinguish it from *Anoplocephala magna*?
Lappets
26
What predilection site is associated with the adult infection of *A. perfoliata*?
Terminal ileum and cecum
27
What is the predilection site associated with *A. magna*?
Small intestine
28
What occurs as a result of haevy infections of *A. perfoliata*?
Ulceration, ill health, obstruction, and intussusseption
29
Who are the IH's and DH's of *A. perfoliata* and *A. magna*?
IH: Orbatid mites DH: Equids
30
What tests can be associated with the diagnosis of *Anoplocephala spp.*?
Fecal flotation and centrifugation, Sedimentation test, ELISA
31
How pathogenic are *A. magna*?
Not very
32
What is the common name for *Moniezia spp.*?
Milk tapeworm
33
Who are the IH's and DH's of *Moinezia spp.*?
IH: Orbatid mites DH: Livestock
34
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
B) Unarmed with suckers
35
What species of cestodes do these eggs belong to?
*Moinezia spp.*
36
What cestode species is present in this equine fecal exam?
*Anoplocephala spp.*
37
What species are associated with the cestode species seen in this fowl fecal sample?
*Choanotaenia* and *Raillietina spp.*
38
You perform a fecal and realize it was mislabeled. What species are associated with producing the following egg?
Dogs, cats (also people)
39
*Taenia spp.* are associated with predominantly what larval stage?
Cysticercus
40
What larval stage is associated with *Taenia taeniaeformis*?
Strobilocercus
41
*Taenia spp.* are associated with infecting the _____ \_\_\_\_\_\_\_ as adults, and are largely non-pathogenic.
**Small intestine**
42
What species are associated with the infection of dogs and foxes?
* Taenia pisiformis* * Taenia crassiceps* * Taenia hydatigena*
43
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?
*Taenia pisiformis*
44
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?
*T. crassiceps*
45
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 -?
*Taenia hydatigena*
46
What *Taenia* species is associated with infecting cats through strobilocercus in small rodents, which serve as an IH?
*Taenia taeniaformis*
47
Meat inspection can be used to ensure that what larval stage will not be consumbed by people for *T. saginata* and *T. solium*?
Cysticercus
48
Where will *T. saginata* be found in its larval stage in cattle?
Striated muscle (cardiac and skeletal)
49
Will the IH experience any clinical signs with *T. saginata* infection?
None, unless there are heavy infections with cyticerci in the heart
50
Is *T. saginata* or *T. solium* zoonotic?
*Taenia solium*
51
Explain how *T. solium* is associated with the causing neurocytsicercosis in humans?
People eat contaminated, uncooked swine meat, or via poor hygiene and lack of sanitation (if shared from person to person)
52
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.
True
53
When humans ingest *T. solium* and *T. saginata* where will larval stages migrate to?
* Taenia solium:* Muscle and brain * Taenia saginata:* Muscle
54
What sites of infection are associated with *T. solium*?
IH: Muscles, eye, brain, SQ tissue FH: Small intestine
55
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.
False, neruocysticercosis (NCC) not taeniosis
56
*Echinococcus granulosus* is associated with what IH's and FH's?
IH: livestock, especially sheep FH: Dog ands canids
57
Where is the larval stage of *Echinococcus granulosus* found during infection of the IH?
Liver, lungs, bones, brain, and other organs
58
*Echinococcus spp.* are associated with what larval stage?
Hydatid cyst
59
True or False: Hydatids are only pathogenic in people, and not in dogs or livestock.
True
60
Who are the IH's and FH's associated with *Echinococcus canadensis*?
IH: People and wild cervids FH: Dogs and canids
61
*Echinococcus multilocularis* cause what disease in people?
Alveolar echinococcosis
62
Hydatid cysts are associated with what organs in IH's of people and animals infected with *E. multilocularis*?
Liver, but also other organs as well
63
True or False: Only one species of the *Echinococcus spp.*, *E. multilocularis*, is zoonotic.
False, *E. multilocularis, E. granulosus*, and *E. canadensis* are all zoonotic
64
What is meant by *E. granulosus* and *E. canadensis* being unilocular?
Each hydatid cyst produce a single oncosphere

RUSVM Parasit SPR 2020 (25 decks)

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