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Parasitology > 7.7 Intestinal Cestodes > Flashcards

7.7 Intestinal Cestodes Flashcards

1
Q

Characterized by a dorsoventrally flattened, most are hermaphroditic

A

Taenia

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2
Q

Taenia spp distinct three regions

A

Scolex, neck, strobila

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3
Q

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

A

T. saginata

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4
Q

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

A

T. solium

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5
Q

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

A

Cysticercus

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6
Q

Cyst form of T. solium

Hooklets are visible

A

Cystecircus cellulosae

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7
Q

Cyst form of T. saginata

No hooklets

A

Cystercircus bovis

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8
Q

Taenia spp definitive host

A

Humans

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9
Q

Clinical manifestations of Taenia infection

A

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

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10
Q

Intrinsic or extrinsic autoinfection

A

Cysticercosis

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11
Q

Pathogenic factor of cysticercosis

A

Cysticercus cellulosae

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12
Q

Tapeworm infection treatment

A

PZQ

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13
Q

Dog tapeworm

A

Echinococcus granulosus

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14
Q

Caused by the larval stages of cestodes of the genus Echinococcus

A

Hydatid disease

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15
Q

Causes cystic echinococcosis

A

E. granulosus

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16
Q

Causes alveolar echinococcosis

A

E. multilocularis

17
Q

Causes polycystic echinococcosis

A

E. vogeli

18
Q

Extremely rare cause of human echinococcosis

A

E. oligarthus

19
Q

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

A

Hydatid cst

20
Q

Prostocolices generally settle down at the bottom of the cyst

A

Hydatid sand

21
Q

Adult Echinococcus granulosus worms reside in the ___

A

Small bowel of dogs

22
Q

Intermediate host of E. granulosus

A

Cattle, sheep, goat, human

23
Q

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)

A

Oncospheres

24
Q

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

A

Hymenolepis nana

25
Q

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

A

Polar filaments

26
Q

H nana definitive hosts

A

Man, rodents

27
Q

Largest human tapeworm

A

Diphyllobothrium latum

28
Q

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

A

Bothria

29
Q

Proglottids of D. latum

A

Rosette-shaped uterus

30
Q

The only cestode with an operculated egg

A

D. latum

31
Q

Intermediate hosts of D. latum

A

Copepods, fish

32
Q

Definitive hosts of D. latum

A

Bears, cats, dogs and humans

33
Q

Infective stage of D. latum for mamals

A

Plerocercoid larva

Parasitology (5 decks)

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