7.7 Intestinal Cestodes

Question 1

Characterized by a dorsoventrally flattened, most are hermaphroditic

Answer 1

Taenia

Question 2

Taenia spp distinct three regions

Answer 2

Scolex, neck, strobila

Question 3

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

Answer 3

T. saginata

Question 4

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

Answer 4

T. solium

Question 5

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

Answer 5

Cysticercus

Question 6

Cyst form of T. solium

Hooklets are visible

Answer 6

Cystecircus cellulosae

Question 7

Cyst form of T. saginata

No hooklets

Answer 7

Cystercircus bovis

Question 8

Taenia spp definitive host

Answer 8

Humans

Question 9

Clinical manifestations of Taenia infection

Answer 9

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

Question 10

Intrinsic or extrinsic autoinfection

Answer 10

Cysticercosis

Question 11

Pathogenic factor of cysticercosis

Answer 11

Cysticercus cellulosae

Question 12

Tapeworm infection treatment

Answer 12

PZQ

Question 13

Dog tapeworm

Answer 13

Echinococcus granulosus

Question 14

Caused by the larval stages of cestodes of the genus Echinococcus

Answer 14

Hydatid disease

Question 15

Causes cystic echinococcosis

Answer 15

E. granulosus

Question 16

Causes alveolar echinococcosis

Answer 16

E. multilocularis

Question 17

Causes polycystic echinococcosis

Answer 17

E. vogeli

Question 18

Extremely rare cause of human echinococcosis

Answer 18

E. oligarthus

Question 19

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

Answer 19

Hydatid cst

Question 20

Prostocolices generally settle down at the bottom of the cyst

Answer 20

Hydatid sand

Question 21

Adult Echinococcus granulosus worms reside in the ___

Answer 21

Small bowel of dogs

Question 22

Intermediate host of E. granulosus

Answer 22

Cattle, sheep, goat, human

Question 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)

Answer 23

Oncospheres

Question 24

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

Answer 24

Hymenolepis nana

Question 25

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

Answer 25

Polar filaments

Question 26

H nana definitive hosts

Answer 26

Man, rodents

Question 27

Largest human tapeworm

Answer 27

Diphyllobothrium latum

Question 28

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

Answer 28

Bothria

Question 29

Proglottids of D. latum

Answer 29

Rosette-shaped uterus

Question 30

The only cestode with an operculated egg

Answer 30

D. latum

Question 31

Intermediate hosts of D. latum

Answer 31

Copepods, fish

Question 32

Definitive hosts of D. latum

Answer 32

Bears, cats, dogs and humans

Question 33

Infective stage of D. latum for mamals

Answer 33

Plerocercoid larva