7.7 Intestinal Cestodes Flashcards Preview

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Flashcards in 7.7 Intestinal Cestodes Deck (33)
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1

Characterized by a dorsoventrally flattened, most are hermaphroditic

Taenia

2

Taenia spp distinct three regions

Scolex, neck, strobila

3

Hookless tapeworm, 4-8 m, 4 suckers 2 lobes, 300-400 testes, 15-30 uterine branches

T. saginata

4

Hook tapeworm, 2-4 m, 4 suckers, rostellum and hooklets, 3 lobes testes, 7-12 uterine branches

T. solium

5

Larval form of tapeworm, consisting of a single scolex enclosed in a bladder-like cyst

Cysticercus

6

Cyst form of T. solium
Hooklets are visible

Cystecircus cellulosae

7

Cyst form of T. saginata
No hooklets

Cystercircus bovis

8

Taenia spp definitive host

Humans

9

Clinical manifestations of Taenia infection

Deprivation of nutrition, dysfunction of the intestine, allergic reactions, appendicitis, obstruction of instetines

10

Intrinsic or extrinsic autoinfection

Cysticercosis

11

Pathogenic factor of cysticercosis

Cysticercus cellulosae

12

Tapeworm infection treatment

PZQ

13

Dog tapeworm

Echinococcus granulosus

14

Caused by the larval stages of cestodes of the genus Echinococcus

Hydatid disease

15

Causes cystic echinococcosis

E. granulosus

16

Causes alveolar echinococcosis

E. multilocularis

17

Causes polycystic echinococcosis

E. vogeli

18

Extremely rare cause of human echinococcosis

E. oligarthus

19

Made up of immature echinococcus, consists of cystic fluid, brood capsule, protoscolex and daughter cyst

Hydatid cst

20

Prostocolices generally settle down at the bottom of the cyst

Hydatid sand

21

Adult Echinococcus granulosus worms reside in the ___

Small bowel of dogs

22

Intermediate host of E. granulosus

Cattle, sheep, goat, human

23

After ingestion of E. granulosus eggs, they hatch in the small bowel and release an ___
Penetrates the intestinal wall and migrates through the circulatory system in various organs (lungs and liver)

Oncospheres

24

The scolex are the sucking discs, above which is the rostellum with hooks

Hymenolepis nana

25

H. nana eggs exhibit ___ lying between the egg shell and the hexacanth embryo

Polar filaments

26

H nana definitive hosts

Man, rodents

27

Largest human tapeworm

Diphyllobothrium latum

28

Spatulate, almone-shaped with a pair of suctorial grooves called ___

Bothria

29

Proglottids of D. latum

Rosette-shaped uterus

30

The only cestode with an operculated egg

D. latum

31

Intermediate hosts of D. latum

Copepods, fish

32

Definitive hosts of D. latum

Bears, cats, dogs and humans

33

Infective stage of D. latum for mamals

Plerocercoid larva