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Parasitology > Cestodes > Flashcards

Cestodes Flashcards

0
Q

CN Hymenolepis diminuta

A

Rat tapeworm

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1
Q

CN diphyllobothrium latium

A

Broad tapeworm/ fish tapeworm

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2
Q

proglottids taenia saginata

A

1000-4000

Apolysis; in single

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3
Q

Length of adult: dipyllidium caninum

A

10-70cm

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4
Q

Final host: raillietina garrisoni

A

Rat

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5
Q

Egg: Taenia solium

A

Spherical, striated, thick embryophore surrounding a hexacanth embryo (30 000 - 50 000 eggs per proglottid)

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6
Q

Pathology hymenolepis nana

A 
Intstinal irritation (enteritis) 
Pruritis: nose and anus
Diarrhea
Anorexia
Abdominal pain
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7
Q

Diagnosis H. Diminuta

A

Stool exam: egg, scolex

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8
Q

Scolex echinococcus granulosus

A

Pyriform: 4 cuplike suckers
ARMED: rostellum with 30-36 hooks

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9
Q

Intermediate host: raillietina garrisoni

A

Flour beetle: Tribolium confusum

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10
Q

Pathology: diphyllobothrium latum

A

Bothriocephalus

Anemia due to vit b12 deficiency (megaloblastic anemia)

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11
Q

Mature/gravid segment: taenia solium

A

7-15 lateral branches (dendritic or fingerlike)

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12
Q

Mature/gravid segment: echinococcus granulosus

A

Midline uterus with Taenia-like egg

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13
Q

Intermediate host: diphyllobothrium latum

A

1st: Cyclops
Diaptomus
2nd: Fish (perch, pike, salmon, trout)

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14
Q

Pathology: echinococcus granulosus

A

Liver cyst: jaundice
Lung cyst: bloody sputum
Brain cyst: epilepsy

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15
Q

Diagnosis: diphyllobothrium latum

A

Stool exam
Gastric analysis
Pernicious anemia –achlorhydria
Raw fish diet + pernicious anemia

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16
Q

Intermediate host: Hymenolepis nana

A

With or without

Indirect cycle: flour beetle
Rice beetle
tenebrio sp

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17
Q

Final host: D. Latum

A

Man/dog/cat

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18
Q

CN: taenia solium

A

Pork tapeworm

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19
Q

Pathology: Dipylidium caninum

A 
Intestinal discomfort
Epigastric pain
Diarrhea
Anal pruritus
allergic rxns
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20
Q

CN: Taenia saginata

A

Beef tapeworm

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21
Q

Mature segment: H. Nana

A

3 testes + 1 ovary (in straight line)

1 uterus

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22
Q

Pathology: Taenia saginata

A

Epigastric pain
Perianal itching
Obstruction: intestine, bile duct, appendix

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23
Q

Intermediate host: Dipylidium caninum

A 
Dog flea (Ctenocephalides canis) 
Cat flea (Ctenocephalides felis)
Human flea ( Pulex irritans)
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24
Q

Diagnosis: raillietina garrisoni

A

Stool exam: ova, gravid segment

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25
Q

Infective stage: taenia solium

A

Cysticercus cellulosae ( bladderworm)

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26
Q

IH: H. diminuta

A 
Fleas
Cockroaches
Beetles
Earwigs
Mealworms
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27
Q

Length of adult: H. Diminuta

A

10-60 cm

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28
Q

Final host: taenia solium

A

Man (if eggs are ingested)

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29
Q

Pathology: taenia solium

A 
Measly pork - infected meat
Intestinal infection
Neurocysticercosis
Verminous epilepsy
Ocular epilepsy
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30
Q

of proglottids: D. Caninum

A

200

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31
Q

Final host: H. nana

A

Man(DH or IH)

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32
Q

Scolex: D. Latum

A

Spoon shaped
Almond shaped
Spatulate shaped
With 2 bothria

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33
Q

Infective stage: D. caninum

A

Cysticercoid

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34
Q

CN Echinococcus granulosus

A

Hydatid worm

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35
Q

Diagnosis: Taenia solium

A 
Stool exam: eggs/scolex/segment
India ink stain
CSF analysis
CAT/ MRI
Ophthalmoscopy
Serolofy: ELISA
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36
Q

Egg: R. garrisoni

A

200-400 egg capsules with 1-4 spindle shaped eggs

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37
Q

IH: E. granulosus

A 
Man (accidental) 
Sheep/ ox
Horse
Goat 
Camel
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38
Q

Egg: H. Diminuta

A

Spherical/ circular
Outher shell: thick
Inner shell: thin
Bipolar thickenings with no polar filaments (fried egg appearance)

39
Q

of proglottidsTaenia solium

A

800-1000

Apolysis: in chain

40
Q

Treatment: e. Granulosus

A

Surgical resection
Albendazole
PAIR intervention

41
Q

Length of adult: Taenia solium

A

2-4 meters

42
Q

IH: Taenia saginata

A

Cattle

Cow

43
Q

Egg: E. Granulosus

A

Subspherical with radially striated embryophore (Taenia like egg)

44
Q

Mature segment: T. Saginata

A

15-20 lateral branches (dichotomous or tree-like)

45
Q

Infective stage: E. granulosus

A

Hydatid cyst

Embryonated ova

46
Q

Man as accidental final host

A

H. Diminuta and d. Caninum

47
Q

Classification

A

Order pseudophyllidea and Order cyclophyllidea

48
Q

Egg: D. latum

A

Oval
Operculated( inconspicuous operculum)
Knoblike thickening opposite the operculum
Immature

49
Q

Infective stage: R. Garrisoni

A

Cysticercoid

50
Q

MOT

A

Ingestion/ autoreinfection

51
Q

Diagnosis: taenia saginata

A

Stool exam: eggs/ scolex/ segment
India ink stain
Perisnala swabs

52
Q

Egg: H. Nana

A

Spherical or subspherical
Outher shell: thin
Inner shell: thick
Bipolar thickenings arising 4-8 hairlike polar filaments

53
Q

Final host: taenia saginata

A

Man

54
Q

Effective therapy:

A

recovery of scolex in stool and (-) stool exam 3 mos. after treatment

55
Q

Diagnosis: e. Granulosus

A 
X-ray 
Ultrasonography
Exploratory cyst puncture
Immunologic test: Casoni ID test
CF/BFT/IHA
56
Q

of proglottids: r. Garrisoni

A

About 5000

57
Q

Infective stage: d. Latum

A

Plerocercoid or Sparganum

58
Q

Mature segment: D. latum

A

Highly coiled uterus (rosette uterus)
Symmetrical
Bilobed ovary

59
Q

Mature segment: D. caninum

A

Bilateral genital pore

Melon shaped, Rice granule, Pumpkin

60
Q

Paratenic host: D. latum

A

Carnivorous fish

61
Q

Egg: Taenia saginata

A

Spherical, striated

Thick embryophore surrounding a hexacanth embryo (97 000-124 000 egger proglottid)

62
Q

Scolex: taenia scolium

A

Globular
4 cuplike suckers
ARMED: rostellum with 25-30 hooks

63
Q

CN C. nana

A

Dwarf tapeworm

64
Q

Diagnosis: D. caninum

A

Stool exam: eggs, scolex, proglottids

Stool exam not recommended: gravid proglottids do not disintegrate within the small intestine but in environment

65
Q

Length of adult: D. Latum

A

3-10 meters

66
Q

IH: Taenia solium

A

Pigs

67
Q

Pathology: H. diminuta

A

Clinical manifestations are minimal and nonspecific

68
Q

Diagnosis: H. nana

A

Stool exam: eggs

Proglottids not recovered bec. of degeneration prior to passage with stool

69
Q

Length of adult: E. granulosus

A

3-6 mm

70
Q

Egg: dipylidium caninum

A

Egg capsule with 8-15 eggs. Eggs are spherical, thin shelled with hexacanth embryo

71
Q

Infective stage: H. nana

A

Cysticercoid
Embryonated ova
(Direct cycle)

72
Q

CN: D. caninum

A

Double pored dog tapeworm

73
Q

Scolex: H. Diminuta

A

Club or knob shaped
4 cuplike suckers
UNARMED: no rostellar hooks

74
Q

of proglottids: H. Nana

A

175-200

75
Q

Pathology: R. garrisoni

A

Usually asymptomatic

Man is an unsuitable host for this parasite

76
Q

Infective stage: taenia saginata

A

Cysticercus bovis

77
Q

Scolex: R. garrisoni

A

Subglobular:
4 cuplike suckers
Armed: 90-140 hammershaped hooks

78
Q

Final host: H. diminuta

A

Rat/man( accidental)

79
Q

Man as accidental final host

A

H. Diminuta and D. Caninum

80
Q

Of proglottids: d. Latum

A

Up to 4000

81
Q

Final host: d. Caninum

A

Dog/man (accidental)

82
Q

Mature segment: h. Diminuta

A

3 testes+ 1ovary (in straight line)

1 uterus

83
Q

Infective stage: H. Diminuta

A

Cysticercoid

84
Q

Scolex: e. Granulosus

A

PYRIFORM
4 cuplike suckers
ARMED: rostellum with 30-36 hooks

85
Q

Length of adult: taenia saginata

A

4-10 meters (25m)

86
Q

Man as accidental IH

A

E. Granulosus

87
Q

Final host: e. Granulosus

A

Dogs

88
Q

Scolex: taenia saginata

A

Cuboidal
4 cuplike suckers
UNARMED: no rostellar hooks

89
Q

Cn: r. Garrisoni

A

Common rat tapeworm

90
Q

Mature segment r. Garrisoni

A

Bilobed ovary surrounded by 36-50 ovoid testes

Rice grain shape gravid proglottid

91
Q

Scolex: H. Nana

A

Subglobular
4 cuplike suckers
Armed: rostellum with 20-30 hooks

92
Q

of proglottids: h. diminuta

A

800-1300

93
Q

of proglottids: E. granulosus

A

3
1 immature
1 mature
1 gravid

94
Q

Habitat

A

Small intestine

95
Q

Scolex: d. caninum

A

Globular: 4 cuplike suckers
Armed: 1-7 rows rosethorn hooklets

96
Q

Autoinfection

A

T. solium and H. nana

Parasitology (4 decks)

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