4. Cestodes Flashcards Preview

Elsevier Parasitology (RVSP) > 4. Cestodes > Flashcards

Flashcards in 4. Cestodes Deck (41):
1

Broadfish tapeworm

Diphyllobothrium latum

2

IS of D. latum

Plerocercoid/sparganum/ova

3

DS of D. latum

Ova
Proglottids (rarely)

4

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

D. latum

5

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

Coracidium

6

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

D. latum

7

Cestode that may cause pernicous anemia

D. latum

8

Dwarf tapeworm

Hymenolepis nana

9

IS of H. nana

Ova

10

DS for H. nana

Ova

11

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

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

12

Rat tapeworm

Hymenolepis diminuta

13

IS of H. diminuta

Ova

14

DA of H. diminuta

Ova

15

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

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

16

Primary host of H. diminuta

Rat

17

Cestodes that may not require intermediate hosts

H. nana
H. diminuta

18

Sunburst appearance ova

Taenia spp.

19

DS for Taenia spp.

Ova
Proglottids (rarely)

20

Beef tapeworm

Taenia saginata

21

Pork tapeworm

Taenia solium

22

Compare T. saginata and T. solium proglottids

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

T. solium:

23

Compare T. saginata and T. solium scolices

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

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

24

IS of T. solium

Cysticercus cellulosae

25

IS of T. saginata

Cysticercus bovis

26

Causes cysticercosis

T. solium

27

When can cysticercosis happen?

When infective ovum of T. solium is ingested

28

Dog or cat tapeworm

Dipylidium caninum

29

Double-pored dog tapeworm

Dipylidium caninum

30

DS of D. caninum

Egg packets
Proglottids

31

IS of D. caninum

Cysticercoid larva

32

Seed-shaped proglottids

D. caninum

33

Primary host of D. caninum

Dog/cat

34

IH of D. caninum

Flea

35

Hydatid tapeworm

Echinococcus granulosus

36

Dog tapeworm

Echinococcus granulosus

37

DS of E. granulosus

Hydatid cyst fluid

38

Ova of E. granulosus is identical to

Taenia spp. ova

39

Has only 3 proglottids

E. granulosus

Immature, mature, and gravid proglottids

40

IH of E. granulosus

Sheep

41

AKA cestodes

Tapeworms