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Parasitology Laboratory > Cestodes > Flashcards

Cestodes Flashcards

(104 cards)

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1
Q

Cestodes are also known as the

A

tapeworms

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2
Q

Cestodes resemble the

A

ribbon (ribbon-like)

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3
Q

True or False:

The embryonated Beef tapeworm egg is the infective stage to humans

A

FALSE
T. saginata
cysticercus bovisi larvae (seen in beef cattle)

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4
Q

True or False: The eggs of Taenia solium and Taenia saginata is indistinguishable from each other.

A

TRUE

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5
Q

True or False: T. solium adult is longer compared to the D.latus adult.

A

FALSE

Tania solium is under the class of cyclophilidean “True tapeowrm” and undergoes apolysis

Dibothriocephalus latus is under the class of pseudophyllidea “False tapeworm” and does not undergo apolysis therefore they are LONGER

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6
Q

The infective stage of the Rat Tapeworm is the

A

Rat tape worm is also known as the Hymenolepis diminuta and their IS is the cysticercoid larvae

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7
Q

The common name of the only tapeworm that may or may not require an intermediate host.

A

Dwarf tapeworm or the Hymenolepis nana

HAVE 2 LIFE CYCLE (DIRECT AND INDIRECT)

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8
Q

GENERALITIES of Cestodes

A

Tape-like or ribbon-like

All are hermaphrodites

All are Segmented

Adult forms inhabit the Small Intestines

No Gastrointestinal Tract (totally)

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9
Q

3 types of segments

A

mature
immature
gravid

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10
Q

T OR F

Trematodes just like cestodes are segmented

A

FALSE

Trematodes and flukes = UNSEGMENTED

Cestodes = SEGMENTED

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11
Q

Diphyllobothrium latum is also called the

A

dibothriocephalus latus

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12
Q

Basic parts of pseudophyllidea (Dibothriocephalus latus / Diphyllobothrium latum)

A 
Scolex
Neck
Immature segments
Mature segments
Gravid segments
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13
Q

part Used for attachments

A

Scolex

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14
Q

Region of growth

A

Neck

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15
Q

part with No reproductive organs

A

immature segment

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16
Q

part with with reproductive organs, without egg

A

mature segment

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17
Q

part with reproductive organs, with egg

A

gravid segment

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18
Q

Basic parts of cyclophyllidea (Taenia spp.)

A 
Scolex
Neck
Immature proglottid
Mature proglottid
Gravid proglottid
Strobila
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19
Q

Scolex of the Taenia spp.

A

for attachment

Globular structure

o	Rostellum (upper portion of scolex; retractable)
o	With Hook (armed rostellum) , without hook (unarmed)
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20
Q

Body of the tapeworm

A

strobila

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21
Q

Scolex of the order pseudophyllidea

A 
•	Spoon-shaped,
almond-shaped, spatulate
•	2 slit-like grooves
(bothria)
•	No rostellum and no hooks
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22
Q

Scolex of the order cyclophyllidea

A
  • Quadrate
  • May possess rostellum
  • 4 cup-like suckers
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23
Q

2 slit-like grooves of the scolex of pseudophyllidea is called

A

bothria

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24
Q

Strobila of
Pseudophyllidea:
Cyclophyllidea:

A

Pseudophyllidea: Anapolytic
Cyclophyllidea: Apolytic

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25
Vitellaria of Pseudophyllidea: Cyclophyllidea:
Pseudophyllidea: diffused with many follicles Cyclophyllidea: compact and separated
26
Gravid proglottid of the cyclophyllidea
Degenerative reproductive organs except uterus
27
Gravid proglottid of the pseudophyllidea
All reproductive organs present Uterus = Rosette appearance
28
Uterine pore of Pseudophyllidea: Cyclophyllidea:
Pseudophyllidea: Present at median, ventral and surface Cyclophyllidea: Absent
29
Difference of the OVA of Pseudophyllidea: Cyclophyllidea:
Pseudophyllidea: Oval, operculated, unembryonated Cyclophyllidea: Spherical, non-operculated, embryonated / mature
30
Larval stages of the pseudophyllidea
Coracidium --> Procercoid --> | Plerocercoid
31
Larval stage of the cyclophyllidea Larvae of the Hymenolepis spp.
Cysticercoid
32
Larvae of the Hymenolepis spp.
Cysticercus
33
larvae of Echinococcus
hydatid cyst
34
Diagnosis
• Stool examination | o Detection of operculated eggs (for cyclo ata to)
35
Pathology
Megaloblastic anemia because this also feeds on the Vitamin B12
36
The diphyllobothrium latum / dibothriocephalus latus (broad fish tapeworm) EGG is mistaken as
egg of paragonimus westermani (oriental lung fluke)
37
Cyclophyllidea also known as
true tapeworms
38
Representative of the order cyclophyllidea
Taenia solium
39
Taenia solium is also known as
pork tapeworm
40
IH of pork tapeworm
Pigs, wild boars, swine families, can also be humans
41
Infective stage of the Taenia solium
Eggs and the cysticercus cellulosae larva
42
meat that is said to be contaminated with Taenia solium is called the
Measly pork
43
Scolex of Taenia solium has
4 cup-shaped suckers | Rostellum is armed (With hooks)
44
GRavid segment/proglottid of Taenia solium has
square-like has 5-13 lateral finger uterine branches
45
T OR F The eggs of Taenia spp. are indistinguishable from each other
TRUE
46
HOW to differentiate Taenia spp.?
Scolex Segments/proglottid
47
how to determine if a treatment is successful?
isolation of the scolex
48
Taenia saginata is also known as
beef tapeworm
49
IH of the beef tapeworm
cattle
50
Infective stage of the beef tapeworm
cysticercus bovis
51
Scolex of the beef tapeworm has
4 cup-like suckers no hooks nor rostellum
52
T OR F The eggs of Taenia spp. are infective to humans
FALSE Only T. solium the egg of Taenia aginata is never infective to humans
53
GRavid segment/proglottid of the T. saginata has
longer than wide compared to the T. solium has 15-20 uterine branches
54
Taenia spp. egg
spherical in shape and has strations Oncosphere with 6 hooklets observed
55
Proglottid of taeniids have a characteristic of
lateral protrusion known as the GENITAL PORE
56
How to visualize the uterine pore of proglottids of taenia spp.
injection of india ink through the genital pore tovisualize the uterine branches
57
Diagnosis of Taeniasis
Stool analysis to detect eggs gravid proglottids (isolate) Scolex (to determine successful treatment)
58
Taeniasis is the
infection of the adult worm
59
What is cysticercosis
infection caused by the Taenia solium alone
60
T OR F Cysticercus cellulosae are erratic
TRUE cysticercus cellulosae are erratic (can be found anywhere such as brain, heart, etc.)
61
Diagnosis of Cysicercosis
Imaging technique because it is inside our body NOT demonstration og eggs
62
T OR F Taenia saginata is deadly compared to Taenia solium
FALSE Taenia solium is deadly as compared to Taenia saginata because it can cause Cysticercosis
63
Dipylidium caninum is also known as the
Double pored tapeworm / DOg or cat tapeworm / pumpkin seed tapeworm / cucumber tapeworm
64
why is it called the double pored tapeworm
because of the two genital pores at the lateral sides
65
Infective stage of the dipylidium caninum
cysticercoid larvae
66
IH of the dipylidium caninum
Fleas, beetles (insects)
67
Diagnostic stage
Segment / proglottid
68
Scolex of the Dipylidium caninum has
Armed (with hooks) rostellum Neck
69
Egg of Dipylidium caninum
5-30 eggs contained in a plastic-like structure/membrane-like structure called the egg packets WITH 6 HOOKLETS
70
T OR F Double pore tapeworm is a zoonotic infection (the source is animals)
TRUE
71
Hymenolepis diminuta is also called the
rat tapeworm
72
Infective stage of the rat tapeworm
cysticercoid larvae
73
IH of rat tapeworm
Fleas and beetles
74
Definitive host of rat tapeworm
rodents / rats
75
Diagnostic stage
egg
76
Scolex of H. nana has
has ARMED rostellum with y-shaped
77
hooklets of T. solium rostellum
Arabian dagger hooklets
78
number of proglottids of H. nana
200
79
Tapeworms that have egg as IS
T. solium H. nana E. granulosus
80
Tapeworms that have ONLY larvae as their IS
T. saginata D. caninum H. diminuta
81
Eggs of the dwarf tapeworm
Hexacanth embryo with polar thickenings WITH POLAR FILAMENTS
82
Difference between H. nana and H. diminuta
H. nana: armed rostellum, egg is with polar filaments H. diminuta: unarmed rostellum, egg has NO polar filaments
83
Echinococcus granulosus infective stage
hydatid cyst or larva and embryonated
84
accidental host of E. granulosus
humans
85
MOT
ingestion of embryonated egg
86
Smallest tapeworm that develops into adult inside the human
H. nana
87
Smallest tapeworm that CANNOT develop to adult inside the human
E. granulosus
88
DEfinitive host of the Echinococcus granulosus
canines
89
IH of Echnicoccus granulosus
sheeps and goats
90
Diagnostic stage of E. granulosus
hydatid cyst
91
T OR F Echinoccocus is a tissue parasite not found in intestines but in tissue
TRUE
92
Rallietina garissoni scolex has
alternation of two circular rows, 90-140 hammer shaped hooks rostellum with hammer shaped hook
93
Radian vineyard hooks is seen in the scolex of
T. solium
94
a minor tapeworm
Rallietina garissoni
95
Treatment against the echinoccocus spp is the
removal of the hydatid cyst prevent the rupture of the cyst filled with fluid
96
What will happen if the hydatid cyst ruptures during treatmentq
patient could undergo anaphylactic reaction spreading of infection
97
oncosphere inside at 6th hooklet is seen in
taenia eggs
98
the sucking groove of the diphyllobothrium latum
bothria
99
pumpkin seed appearance of scolex is seen in
dipyllidium caninum
100
The Intradermal test to diagnose Hydatid disease.
Casoni Intradermal test
101
How to differentiate hymenolepis spp.
EGGS nana is smaller and with polar filaments diminuta is larger with NO polar filaments
102
Presence of two genital pores in a proglottid is diagnostic of what tapeworm? Give the scientific names
D. caninum, hence known as double pored tapeworm
103
True or False: Taenia solium egg is an infective stage to human
TRUE
104
Give the scientific name of the only tapeworm with operculated eggs.
D. latus/ D. latum

Parasitology Laboratory (12 decks)

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