4. Cestodes Flashcards

1
Q

Broadfish tapeworm

A

Diphyllobothrium latum

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2
Q

IS of D. latum

A

Plerocercoid/sparganum/ova

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3
Q

DS of D. latum

A

Ova

Proglottids (rarely)

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4
Q

Has eggs that do not contain the normal hexacanth embryo of other cestodes

A

D. latum

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5
Q

Instead of hexacanth embryo inside D. latum eggs, it contains

A

Coracidium

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6
Q

Scolex: almond-shaped with 2 long sucking grooves (bothria)

A

D. latum

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7
Q

Cestode that may cause pernicous anemia

A

D. latum

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8
Q

Dwarf tapeworm

A

Hymenolepis nana

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9
Q

IS of H. nana

A

Ova

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10
Q

DS for H. nana

A

Ova

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11
Q

Compare H. nana and H. diminuta in terms of their scolices

A

H. nana: 4 suckers, short rostellum with hooks

H. diminuta: 4 suckers, small projecting rostellum without hooks

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12
Q

Rat tapeworm

A

Hymenolepis diminuta

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13
Q

IS of H. diminuta

A

Ova

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14
Q

DA of H. diminuta

A

Ova

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15
Q

Compare H. nana and H. diminuta in terms of their ova

A

H. nana: round, hexacanth embryo with 3 pairs of hooklets, shell with bipolar thickenings and filaments

H. diminuta: round, hexacanth embryo with 3 pairs of hooklets, shell with bipolar thickenings but NO filaments

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16
Q

Primary host of H. diminuta

A

Rat

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17
Q

Cestodes that may not require intermediate hosts

A

H. nana

H. diminuta

18
Q

Sunburst appearance ova

A

Taenia spp.

19
Q

DS for Taenia spp.

A

Ova

Proglottids (rarely)

20
Q

Beef tapeworm

A

Taenia saginata

21
Q

Pork tapeworm

A

Taenia solium

22
Q

Compare T. saginata and T. solium proglottids

A

T. saginata: >1000, rectangular, 15-30 uterine branches

T. solium:

23
Q

Compare T. saginata and T. solium scolices

A

T. saginata: 1-2 mm, 4 suckers (unarmed)

T. solium: 1-2 mm, 4 suckers, rostellum, and hooks (armed)

24
Q

IS of T. solium

A

Cysticercus cellulosae

25
Q

IS of T. saginata

A

Cysticercus bovis

26
Q

Causes cysticercosis

A

T. solium

27
Q

When can cysticercosis happen?

A

When infective ovum of T. solium is ingested

28
Q

Dog or cat tapeworm

A

Dipylidium caninum

29
Q

Double-pored dog tapeworm

A

Dipylidium caninum

30
Q

DS of D. caninum

A

Egg packets

Proglottids

31
Q

IS of D. caninum

A

Cysticercoid larva

32
Q

Seed-shaped proglottids

A

D. caninum

33
Q

Primary host of D. caninum

A

Dog/cat

34
Q

IH of D. caninum

A

Flea

35
Q

Hydatid tapeworm

A

Echinococcus granulosus

36
Q

Dog tapeworm

A

Echinococcus granulosus

37
Q

DS of E. granulosus

A

Hydatid cyst fluid

38
Q

Ova of E. granulosus is identical to

A

Taenia spp. ova

39
Q

Has only 3 proglottids

A

E. granulosus

Immature, mature, and gravid proglottids

40
Q

IH of E. granulosus

A

Sheep

41
Q

AKA cestodes

A

Tapeworms