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PARASITOLOGY-LEC > LESSON 5 : CESTODES / PHYLUM PLATYHELMINTHES > Flashcards

LESSON 5 : CESTODES / PHYLUM PLATYHELMINTHES Flashcards

1
Q

What organ in cestodes functions as the hold-fast structure?

A

Scolex

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2
Q

What is the common term used to refer to cestodes?

A

Tapeworms

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3
Q

What is the shape of the scolex in Pseudophyllidean cestodes?

A

Spatulate

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4
Q

What kind of symmetry do cestodes exhibit?

A

Bilateral symmetry

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5
Q

What does the term ‘hermaphroditic’ mean in cestodes?

A

Having both male and female reproductive organs

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6
Q

What is the name of the cestode segment that contains eggs?

A

Gravid proglottid

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7
Q

What is the part of the cestode where new segments grow?

A

Neck

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8
Q

What is the central larval stage found in the ova of Diphyllobothrium latum?

A

Coracidium

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9
Q

What larval stage of Diphyllobothrium latum is found in fish?

A

Plerocercoid

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10
Q

What is the appearance of the egg of Diphyllobothrium latum?

A

Oval or ellipsoidal

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11
Q

What type of intermediate host does Taenia solium require?

A

Pig

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12
Q

What diagnostic test is used for detecting Taenia spp.?

A

Direct Fecal Examination

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13
Q

What is the infective larval form of Taenia species called?

A

Cysticercus

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14
Q

What is the common name of Hymenolepis nana?

A

Dwarf tapeworm

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15
Q

What is the name of the intermediate host of Hymenolepis diminuta?

A

Grain beetle

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16
Q

What type of scolex does Dipylidium caninum have?

A

Club-shaped

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17
Q

What type of larval stage is seen in Spirometra spp.?

A

Sparganum

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18
Q

What parasite causes hydatid disease?

A

Echinococcus spp.

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19
Q

What is the treatment of choice for cestode infections?

A

Praziquantel

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20
Q

What tapeworm has a uterus with a rosette shape?

A

Diphyllobothrium latum

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21
Q

What worm has eggs with polar filaments and knobs?

A

Hymenolepis nana

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22
Q

What parasite has a thick-shelled sac containing 8–15 eggs?

A

Dipylidium caninum

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23
Q

What cestode has 3 proglottids only?

A

Echinococcus spp.

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24
Q

What does CE5 classification in hydatid cysts indicate?

A

Inactive cyst

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25
What is the alternate name for the operculum's posterior part in D. latum eggs?
Abopercular knob
26
What parasite has hooks and striated eggs?
Taenia spp.
27
What causes megaloblastic anemia in fish tapeworm infection?
Vitamin B12 deficiency
28
What type of scolex does Echinococcus granulosus have?
Pyriform with hooks
29
What larval structure encloses daughter cysts in hydatid disease?
Brood capsule
30
What type of egg development occurs in Cyclophyllidean?
Fully embryonated
31
What structure in T. saginata has 15–20 lateral uterine branches?
Gravid segment
32
What structure is known as the reproductive proglottid?
Gravid segment
33
What worm has a bladderworm form called cysticercus bovis?
Taenia saginata
34
What species causes neurocysticercosis?
Taenia solium
35
What parasite's eggs resemble hookworm under the microscope?
Dipylidium caninum
36
What is the alternate treatment for Hymenolepis nana?
Niclosamide
37
What kind of life cycle does H. diminuta follow?
Direct
38
What is the general body shape of cestodes?
Flat, ribbon-like
39
What part of the proglottid has all reproductive organs visible?
Mature segment
40
What is the difference between anapolytic and apolytic proglottids?
Apolytic retains eggs; Anapolytic releases eggs before detaching
41
What kind of hooks are present in T. solium?
Double row of brown chitinous hooks
42
What test uses India Ink for Taenia proglottids?
India Ink staining
43
What parasite has 300–400 follicular testes and vaginal sphincter?
Taenia saginata
44
What is the function of the rostellum?
Attachment to the intestinal mucosa
45
What larval stage is inside copepods for Pseudophyllideans?
Procercoid
46
What cestode has a spiral uterus?
Spirometra spp.
47
What is the appearance of H. diminuta's rostellum?
Rudimentary without hooks
48
What condition results from sparganum infection?
Sparganosis
49
What parasite has pseudosegmentation instead of true segments?
Spirometra spp.
50
What larval stage of Diphyllobothrium is infective to humans?
Plerocercoid
51
What worm has asymmetrical eggs with irregular pitting?
Spirometra spp.
52
What type of proglottid contains both male and female reproductive systems in Dipylidium?
Mature proglottid
53
What tapeworm has a scolex with cleft-like invaginations?
Spirometra spp.
54
What tapeworm species infects both dogs and cats?
Dipylidium caninum
55
What organ system is absent in cestodes?
Digestive system
56
What larval stage in Echinococcus contains protoscoleces?
Hydatid cyst
57
What is the diagnostic method used to identify hydatid cysts in the liver?
Hepatic sonography
58
What stage of Diphyllobothrium egg is ciliated?
Coracidium
59
What life cycle trait allows H. nana to cause autoinfection?
Autoinfection cycle
60
What is the difference between hexacanth and coracidium embryos?
Hexacanth has hooks, coracidium is ciliated
61
What is the infective form of Taenia spp. in meat?
Cysticercus
62
What are the intermediate hosts for Diphyllobothrium latum?
Copepod and fish
63
What species uses flour beetles as intermediate hosts?
Hymenolepis nana
64
What species has 2 sets of reproductive organs per segment?
Dipylidium caninum
65
What condition causes hypersegmentation of neutrophils?
Megaloblastic anemia
66
What cestode has an operculated egg with a terminal knob?
Diphyllobothrium latum
67
What species has 100–200 follicular testes and 3-lobed ovary?
Taenia solium
68
What proglottid of Taenia is inked for diagnosis?
Gravid segment
69
What is the scolex structure used for?
Attachment to intestinal wall
70
What parasite is associated with measly pork?
Taenia solium
71
What does the term heteroxenous mean?
Requires two or more hosts
72
What is the scolex structure of Cyclophyllideans?
Globular with acetabula
73
What parasite has daughter cysts within a mother cyst?
Echinococcus spp.
74
What part of the cestode is referred to as strobila?
Body composed of proglottids
75
What is the main route of human infection for Cyclophyllideans?
Ingestion of infected meat
76
What classification system is used for hydatid cysts?
CL/CE1–CE5
77
What cestode has a scolex with 4 acetabula?
Cyclophyllideans
78
What parasite has a bladderworm called cysticercus cellulosae?
Taenia solium
79
What cestode uses sheep and goats as intermediate hosts?
Echinococcus spp.
80
What parasite causes polycystic hydatid cysts in the liver?
Echinococcus vogeli
81
What is the purpose of the Brood capsule in hydatid cysts?
Encloses daughter cysts
82
What cestode egg is stained with Acid-Fast Bacilli stain?
Taenia spp.
83
What condition is diagnosed using Del Brutto’s Classification?
Neurocysticercosis
84
What worm species has an extremely rare unicystic form?
Echinococcus oligarthrus
85
What is the difference between CE2 and CE3 cysts?
CE2 is active; CE3 is transitional
86
What cestode has a hydatid sand?
Echinococcus spp.
87
What part of the parasite forms the scolex in hydatid cysts?
Protoscoleces
88
What condition results when larval cysts infect muscles?
Cysticercosis
89
What parasite has an almond-shaped scolex?
Diphyllobothrium latum
90
What is the significance of striated eggs in Taenia?
Diagnostic feature
91
What cestode is zoonotic and has rodents as accidental hosts?
Hymenolepis diminuta
92
What is the usual treatment before anti-parasitic drugs in cysticercosis?
Surgical removal
93
What parasite causes anal pruritis in humans and pets?
Dipylidium caninum
94
What cestode infects the lungs with alveolar cysts?
Echinococcus multilocularis
95
What structure helps differentiate H. nana from H. diminuta eggs?
Polar knobs
96
What worm has midline uterus with lateral evaginations?
Echinococcus spp.
97
What worm has cilia on its larval stage?
Diphyllobothrium latum
98
What parasite's uterus is sac-like and not easily visible?
Hymenolepis nana
99
What is the shape of the egg of Diphyllobothrium latum?
Oval or ellipsoidal

PARASITOLOGY-LEC (4 decks)

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