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Parasitology > Cestodes > Flashcards

Cestodes Flashcards

1
Q

General shape of Cestodes

A

Flat or Ribbon like

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2
Q

Cestodes do not contain

A

Alimentary tract and body cavity

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3
Q

Cestodes contain

A

Excretory, Nervous, Reproductive

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4
Q

All are HEXECANTH except

A

Echinococcus granulosus (hydatid cyst)

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5
Q

All are HETEROXENOUS except

A

Hymenolipis nana (Homoxenous)

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6
Q

All are CYCLOPHILLIDEA except

A

Dipholobotrium latum (pseudophillidea)

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7
Q

Cestodes body parts are

A

Head (scolex)
Neck
Trunk (Strobilla)

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8
Q

Head or Scolex function

A

Attachment or adapters (suckers, hooklets, rostellum)

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9
Q

Neck function

A

Location for growth and budding

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10
Q

Neck contains

A

Germinal cells to produce reproductive organ

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11
Q

NOPS means

A

No Ova and Parasite Seen

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12
Q

Diagnostic tool used for Cestodes

A

Stool
Biopsy
Perianal swab
Serologic Test

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13
Q

Stool recovers

A

Eggs, gravid proglottid, rare scolex

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14
Q

Biopsy detects

A

Echinoccus granulosus

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15
Q

Serologic test used

A

ELISA

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16
Q

Perianal swab recovers

A

Eggs

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17
Q

Adult worm in Small intestine
(Definitive host)

A

DTTHH
Dipholobotrium latum
T.solium
T.saginata
H.nana
H.diminuta

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18
Q

Larval stage in men
Accidental Intermediate host

A

DTE
D.latum
T.solium
E.granulosus

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19
Q

Trunk first part

A

Immature (tissue and muscles)

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20
Q

Trunk middle part

A

Mature (testes/ovaries)

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21
Q

Trunk last part

A

Riped/gravid excreted in feces

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22
Q

Cyclophiledia shape

A

Ovoidal shape

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23
Q

Pseudophalidea shape

A

Spatulate

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24
Q

Taenia solium egg SCOLEX characteristics

A

Globular scolex
Head with hooklets
Large rostellum

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25
Q

H.nana

A

Globular scolex
Refractile rostellum
Y shaped hooklets

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26
Q

Globular scolex with hooklets

A

E.granulosus

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27
Q

Prominent conical rostellum with protrusion

A

D.caninum

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28
Q

Almond/spatulate/spoon scolex

A

D.latum

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29
Q

Globular scolex withouth hooklets and rostellum

A

T.saginata

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30
Q

H.diminuta

A

Globular scolex with undeveloped/rudimentary apical ROSTELLUM
WITHOUT HOOKLETS

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31
Q

Neck main function

A

Growth for Strobila
Consist of chains of segments/proglottids

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32
Q

Hermaprodhitic

A

Mature segment

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33
Q

Uterus filled with egg

A

Gravid segment

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34
Q

Mature and Gravid of D.latum

A

Mature: No distinct
Gravid: Broader than longer

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35
Q

Mature and Gravid; T.solium

A

Mature: 100-200 follicular testes
Gravid: longer than broader

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36
Q

Mature and Gravid: T.saginata

A

Mature: 300-400 follicular testes
Gravid: Longer than broader

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37
Q

Mature and gravid: H.nana and H.diminuta

A

Mature: 3 testes - 1 ovary
Gravid: Saccular uterus

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38
Q

Mature and Gravid: E.granulosus

A

Mature: 1 reproductive set; 1 scolex, 1 mature, 1 immature, 1 gravid proglottid
Gravid: coiled, loosely twisted with midline lateral evagination

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39
Q

Common name of D.latum

A

Broad Fish Tapeworm
Russian broad tapeworm

40
Q

ONLY CESTODES THAT CAN INFECT MAN

A

D.latum

41
Q

D.latum clinical significance in man

A

V12 deficiency (Megaloblastic anemia)

42
Q

D.latum shape and scolex

A

55-75 long, 40-55 wide
Scolex: almond, spatulate, spoon shaped

43
Q

Embryo charac of D.latum

A

Undeveloped, coracidium

44
Q

Shell charac of D.latum

A

Smooth, yellow-brown

45
Q

Other charac of D.latum

A

1 operculum on one side
Terminal knob on opposite side

46
Q

Definitive host of d.latum

A

Man

47
Q

Intermediate host

A

Freshwater Crustaceans

48
Q

1st IH of D.Latum

A

Cyclops/copepods

49
Q

2nd IH of D.latum

A

Small fishes eaten by Large fishes (Eel, Pile, trout)

50
Q

Infective Stage of D.latum

A

PLEROCERCOID (Secondary larval stage) in man

51
Q

1st larval stage of D.latum

A

Procercoid

52
Q

T.solium and T.saginata DEFINITIVE HOST

A

Man

53
Q

Common name of T.solium

A

Armed Tapeworm
With rostellum, hooklets, and scolex

54
Q

Common name T.saginata

A

Unarmed tapeworm
No rostellum and hooklets

55
Q

Intermediate host: T.solium

A

Pork/pigs

56
Q

Intermediate host: T.saginata

A

Cattle/cows

57
Q

Infective stage: T.solium

A

Cysticercus cellulosae

58
Q

Infective stage: T.saginata

A

Cysticercus bovis

59
Q

Scolex shape: T.solium

A

Small and globular Rostellum with hooks double crown

60
Q

Scolex shape: T.saginata

A

Large without rostellum and hooklets

61
Q

Number of Proglottids: T.solium

A

<1000

62
Q

Number of Proglottids: T.saginata

A

1000-2000

63
Q

Uterus shape: T.solium

A

Square
7-15 thick
Dendritic

64
Q

Uterus shape: T.saginata

A

15-30 thin
Rectangular
Dichotomous

65
Q

Vaginal Sphincter

A

T.solium: Absent
T.saginata: Present

66
Q

Accesorry ovarian lobe

A

T.solium: mature
T.saginata: none

67
Q

Embryo of taenia

A

3 three pairs, hexacanth embryo

68
Q

Other features of Taenia

A

Radial striation, yellow-brown embryosphore

69
Q

Length of T.solium

A

2-3 nm

70
Q

Length of T.saginata

A

5-10 nm

71
Q

Natural detachment of gravid proglottid on main body

A

Apolosis

72
Q

Hymenolepis dimunita common name

A

Rat Tapeworm

73
Q

Infective stage of H.diminuta

A

Cystecercoid larva

74
Q

Scolex of H.dimunita

A

Four suckers; apical/rudimentary undeveloped without hooklets

75
Q

Proglottid: H.dimunita

A

Rectangular; sac like uterus

76
Q

Hooklets of dimunita

A

Three hexacanth embryo

77
Q

Polar thickenings; H.dimunita

A

Present

78
Q

Polar Filaments: H.Dimunita

A

Absent

79
Q

Embryophore; H.diminuta

A

Present; colorless

80
Q

Dwarf Tapeworm

A

Hymenolepis nana

81
Q

Hymenolepis is known to be the

A

Smallest intestinal cestode
Most common cestode worlwide

82
Q

Scolex; H.nana

A

4 suckers; small rostellum with one row hooks

83
Q

Proglottid; H.nana

A

Rectangular; saclike

84
Q

Polar thickenings
Polar filaments

;H.nana

A

Present
Present

85
Q

Common name of Dipylidium caninum

A

Pumpkin seed Tapeworm
Double pored Tapeworm
Dog/Cat Tapeworm

86
Q

Infective stage; D. Caninum

A

Cystecercoid larva

87
Q

Appearance of D. Caninum proglottid

A

Vase-shaped

88
Q

Scolex; D. Caninum

A

Club shaped armed rostellum with 7 circlets

89
Q

Proglottid; D. Caninum

A

Pumpkin seed mature and gravid
2 sets reproductive orgabs
2 genital pores

90
Q

E. Granulosus common name

A

Hydatid Tapeworm
Dog tapeworm

91
Q

Definitive host

A

Dogs

92
Q

Intermediate host

A

Sheep/man

93
Q

HIghly antigenic can cause anaphylactic shock

A

Hydatid cyst fluid

94
Q

Skin test for granulosus

A

Casoni test

95
Q

Infective stage: E.granulosus

A

Hydatid cyst

Parasitology (1 decks)

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