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
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Cyst form of T. solium
Hooklets are visible
Cystecircus cellulosae
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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
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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
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H. nana eggs exhibit ___ lying between the egg shell and the hexacanth embryo
Polar filaments
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H nana definitive hosts
Man, rodents
27
Largest human tapeworm
Diphyllobothrium latum
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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