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Parasitology > Cestodes > Flashcards

Cestodes Flashcards

(95 cards)

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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
H.nana
Globular scolex Refractile rostellum Y shaped hooklets
26
Globular scolex with hooklets
E.granulosus
27
Prominent conical rostellum with protrusion
D.caninum
28
Almond/spatulate/spoon scolex
D.latum
29
Globular scolex withouth hooklets and rostellum
T.saginata
30
H.diminuta
Globular scolex with undeveloped/rudimentary apical ROSTELLUM WITHOUT HOOKLETS
31
Neck main function
Growth for Strobila Consist of chains of segments/proglottids
32
Hermaprodhitic
Mature segment
33
Uterus filled with egg
Gravid segment
34
Mature and Gravid of D.latum
Mature: No distinct Gravid: Broader than longer
35
Mature and Gravid; T.solium
Mature: 100-200 follicular testes Gravid: longer than broader
36
Mature and Gravid: T.saginata
Mature: 300-400 follicular testes Gravid: Longer than broader
37
Mature and gravid: H.nana and H.diminuta
Mature: 3 testes - 1 ovary Gravid: Saccular uterus
38
Mature and Gravid: E.granulosus
Mature: 1 reproductive set; 1 scolex, 1 mature, 1 immature, 1 gravid proglottid Gravid: coiled, loosely twisted with midline lateral evagination
39
Common name of D.latum
Broad Fish Tapeworm Russian broad tapeworm
40
ONLY CESTODES THAT CAN INFECT MAN
D.latum
41
D.latum clinical significance in man
V12 deficiency (Megaloblastic anemia)
42
D.latum shape and scolex
55-75 long, 40-55 wide Scolex: almond, spatulate, spoon shaped
43
Embryo charac of D.latum
Undeveloped, coracidium
44
Shell charac of D.latum
Smooth, yellow-brown
45
Other charac of D.latum
1 operculum on one side Terminal knob on opposite side
46
Definitive host of d.latum
Man
47
Intermediate host
Freshwater Crustaceans
48
1st IH of D.Latum
Cyclops/copepods
49
2nd IH of D.latum
Small fishes eaten by Large fishes (Eel, Pile, trout)
50
Infective Stage of D.latum
PLEROCERCOID (Secondary larval stage) in man
51
1st larval stage of D.latum
Procercoid
52
T.solium and T.saginata DEFINITIVE HOST
Man
53
Common name of T.solium
Armed Tapeworm With rostellum, hooklets, and scolex
54
Common name T.saginata
Unarmed tapeworm No rostellum and hooklets
55
Intermediate host: T.solium
Pork/pigs
56
Intermediate host: T.saginata
Cattle/cows
57
Infective stage: T.solium
Cysticercus cellulosae
58
Infective stage: T.saginata
Cysticercus bovis
59
Scolex shape: T.solium
Small and globular Rostellum with hooks double crown
60
Scolex shape: T.saginata
Large without rostellum and hooklets
61
Number of Proglottids: T.solium
<1000
62
Number of Proglottids: T.saginata
1000-2000
63
Uterus shape: T.solium
Square 7-15 thick Dendritic
64
Uterus shape: T.saginata
15-30 thin Rectangular Dichotomous
65
Vaginal Sphincter
T.solium: Absent T.saginata: Present
66
Accesorry ovarian lobe
T.solium: mature T.saginata: none
67
Embryo of taenia
3 three pairs, hexacanth embryo
68
Other features of Taenia
Radial striation, yellow-brown embryosphore
69
Length of T.solium
2-3 nm
70
Length of T.saginata
5-10 nm
71
Natural detachment of gravid proglottid on main body
Apolosis
72
Hymenolepis dimunita common name
Rat Tapeworm
73
Infective stage of H.diminuta
Cystecercoid larva
74
Scolex of H.dimunita
Four suckers; apical/rudimentary undeveloped without hooklets
75
Proglottid: H.dimunita
Rectangular; sac like uterus
76
Hooklets of dimunita
Three hexacanth embryo
77
Polar thickenings; H.dimunita
Present
78
Polar Filaments: H.Dimunita
Absent
79
Embryophore; H.diminuta
Present; colorless
80
Dwarf Tapeworm
Hymenolepis nana
81
Hymenolepis is known to be the
Smallest intestinal cestode Most common cestode worlwide
82
Scolex; H.nana
4 suckers; small rostellum with one row hooks
83
Proglottid; H.nana
Rectangular; saclike
84
Polar thickenings Polar filaments ;H.nana
Present Present
85
Common name of Dipylidium caninum
Pumpkin seed Tapeworm Double pored Tapeworm Dog/Cat Tapeworm
86
Infective stage; D. Caninum
Cystecercoid larva
87
Appearance of D. Caninum proglottid
Vase-shaped
88
Scolex; D. Caninum
Club shaped armed rostellum with 7 circlets
89
Proglottid; D. Caninum
Pumpkin seed mature and gravid 2 sets reproductive orgabs 2 genital pores
90
E. Granulosus common name
Hydatid Tapeworm Dog tapeworm
91
Definitive host
Dogs
92
Intermediate host
Sheep/man
93
HIghly antigenic can cause anaphylactic shock
Hydatid cyst fluid
94
Skin test for granulosus
Casoni test
95
Infective stage: E.granulosus
Hydatid cyst

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