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Cestodes Flashcards

1
Q

I. Flat or ribbon-like appearance
I. Has 3 Life Cycle (Egg, Larval stage, Adult)
III. Hermaphroditic
IV. No circulatory system
V. Digestive tract is absent
VI. All are heteroxenous (Requires one intermediate host)
*EXCEPT for Hymenolepis nana because it can complete its cycle in a single hostàAuto-reinfection is known in the life cycle of H. nana

A

Cestodes

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2
Q

What is also known as oncosphere?

A

Hexacanth embryo

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3
Q

It is motile, first larval stage with six small hooks (hooklets)

A

Oncosphere

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4
Q

What is the Infective stage for cestodes?

A

Ingestion of egg or larval stage

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5
Q

What is the Diagnostic stage for cestodes?

A

Larval form in stool specimen

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6
Q

Both male and female reproductive system appear in mature proglottid. This is also known as self-fertilizing

A

Hermaphroditic

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7
Q

What are the Intestinal species in Class Cestoda? (TTHHDD)

A 
I. Taenia saginata
II. Taenia solium
III. Hymenelopis diminuta
IV. Hymenolopis nana
V. Dipylidium caninum
VI. Diphyllobothrium latum
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8
Q

Intestinal-extraintestinal species in Class Cestoda?

A

Echinococcus granulosus

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9
Q

Tapeworm body consists of:

A

I. Scolex/Head
II. Neck
III. Segments/Proglottids

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10
Q
  • Organ adapted for attachment, the anterior end.
  • Typical globular scolex has four-cup shaped suckers that gives ability to attach to the intestinal mucosa
  • May have rostellum and hooklets.
A

Scolex/Head

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11
Q

Fleshy extension of the scolex and can have one

or two rows of hooks

A

Rostellum

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12
Q

What are the species with Globular Scolex w/ Hooklets?

A

I. Taenia solium
II. Hymenolepis nana
III. Dipylidium caninum
IV. Echinococcus granulosus

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13
Q

What are the species with Globular Scolex w/o Hooklets?

A

I. Taenia saginata

II. Hymenolopis diminuta

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14
Q

Spatulate Scolex that has 2 False suckers with Bothria?

A

Diphyllobothrium latum

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15
Q

Budding zone consisting of germinative tissues

A

NECK

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16
Q

Chain of segments

A

Strobila

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17
Q

Chain of segments

A

Strobila

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18
Q

Segments detach or rupture with mature eggs inside

A

Apolytic

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19
Q

Segments detach after eggs are exhausted.

A

Anapolytic

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20
Q

Region immediately posterior to the neck

A

Immature

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21
Q

Constitute the middle part

A

Mature

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22
Q

Terminal portion of the

strobila, farthest point away from the scolex

A

Gravid/ Ripe

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23
Q

What are the two classes of tapeworms?

A

I. Pseudophyllidean

II. Cyclophillidean

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24
Q

What best describes the ff characteristics:
I. Scolex with bothria, with or without hookers but never has suckers
II. Neck is present or absent
III. Anapolytic Proglottids
IV. Genital pore is laterally located
V. Uterine pore is dorsal or ventrally located

A

Pseudophyllidean

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25
``` What best describes the ff characteristics? I. Scolex with 4 suckers II. Neck is present or absent III. Apolytic Proglottids IV. Genital pore is laterally located V. No Uterine pore ```
Cyclophillidean
26
What is the morphology of egg Taenia solium and Taenia saginata? I. INDISTINGUISHABLE between Solium and Saginata II. Size: 28-40 um III. Hooklets: _____ pairs, hexacanth embryo IV. Features: Radial striations on ______ brown embryophore
I. INDISTINGUISHABLE between Solium and Saginata II. Size: 28-40 um III. Hooklets: Three pairs, hexacanth embryo IV. Features: Radial striations on yellow brown embryophore
27
``` What spp best describes the ff characteristics: I. Cyclophyllidean II. Pork Tapeworm III. Cystecercus cellulosae IV. IH: Swine / hogs V. DH: Man VI. 4 suckers; Has Rostellum; Has Hooks (Double Crown); 1-2 mm VII: Average No. of Proglottids: 898 7-15 lateral branches on each side Somewhat square ```
Taenia solium
28
``` What spp best describes the ff characteristics: I. Cyclophillidean II. Beef / Unarmed Tapeworm III. Cystecercus bovis IV: IH: Cows / Cattles V. DH: Man VI. 4 suckers No Rostellum No Hooks 1-2 mm VII. Average No. of Proglottids: 898 7-15 lateral branches on each side Somewhat square ```
Taenia saginata
29
What is the Infective stage of Hymenolepis diminuta and nana?
Ingestion of Embryonated egg from contaminated food or water
30
What is the Diagnostic stage of Hymenolepis diminuta and nana?
Embryonated egg in Stool
31
Average Size: 55-85 um Hooklets: Three pairs, hexacanth embryo Polar Thickenings: Present Polar Filaments: Absent Embryophore: Colorless, Present
Hymenolepis diminuta
32
Average Size:45-38 um Hooklets: Three pairs, hexacanth embryo Polar Thickenings: Present Polar Filaments: Present Embryophore: Colorless, Present
Hymenolepis nana
33
Classification of H. diminuta?
Cyclophillidean
34
Classification of H. nana?
Cyclophillidean
35
Common name of H. diminuta?
Rat Tapeworm
36
Common name of H. nana?
Dwarf Tapeworm
37
Larval stage of H. diminuta?
Cysticercoid
38
Larval stage of H. nana?
Cysticercoid
39
What is the intermediate host of H. diminuta?
Fleas / Cockroaches
40
The intermediate host of H. nana?
None
41
Definite host of H. diminuta?
Rat / Rarely Man
42
Definite host of H. nana?
Man/ Rat
43
Scolices for H. diminuta
4 suckers Small Rostellum No Hooks Protruding from Anterior
44
Scolices for H. nana
4 suckers Short Rostellum Has row of hooks in Rostellum
45
Gravid ploglottids of H. diminuta
Typically, rectangular (1x2mm) | Hermaphroditic Saclike uterus filled with eggs
46
Gravid ploglottids of H. nana
- Resemble those of H. Diminuta both in size and appearance | - Saclike uterus filled with eggs
47
What is the classification of Dipylidium caninum?
Cyclophillidean
48
What is the common name of Dipylidium caninum?
Dog or Cat Tapeworm / | Pumpkin Seed tapeworm
49
Larval stage of D. caninum?
Cysticercoid
50
Intermediate host of D. caninum
Dog fleas / Human Fleas
51
Definitive host of D. caninum
Dog / Rarely man
52
What is the morphology of egg in Dypilidium caninum? I. No. of Eggs Packet: 5-30 eggs II. Diameter: 30-60 um III. Features: ____ hooked Oncosphere
I. No. of Eggs Packet: 5-30 eggs II. Diameter: 30-60 um III. Features: Six hooked Oncosphere
53
``` What is the morphology of adult in Dypilidium caninum? I. Scolex: -______ Suckers -Has a ____-shaped rostellum with one to seven circlets of spines -No Hooks II. Gravid Proglottid -Has a shape of a _____ seed -Full of eggs enclosed in embryonic membrane ```
``` I. Scolex: -Four Suckers -Has a club-shaped rostellum with one to seven circlets of spines -No Hooks II. Gravid Proglottid -Has a shape of a pumpkin seed -Full of eggs enclosed in embryonic membrane ```
54
What is the Classification of Diphyllobothrium latum?
Pseudophyllidean
55
Common name of Diphyllobothrium latum?
Fish broad / Broad Russian | tapeworm
56
Larval stage of D. latum?
Plerocercoid larva
57
Intermediate host of Diphyllobothrium latum?
I. 1st Intermediate: Copepods (Cyclops/Diaptomus) | II. 2nd Intermediate: Fishes (Pike/Eel/Trout)
58
Definitive host of D. latum
Man
59
Diagnostic stage of D. latum?
Embryonated egg in stool | of definitive host
60
Infective stage of D. latum?
Predator fish, Plerocercoid | invades tissue
61
``` Morpholohy of egg of D. latum? I. Size: 55-75um long x 40-55um wide Shape: _____-like II. Embryo: Undeveloped, called ________ III. Shell: Smooth, yellow ______ color IV. Features: _____ on one end, terminal knob on opposite end (Abopercular Knob) ```
I. Size: 55-75um long x 40-55um wide o Shape: Oblong-like II. Embryo: Undeveloped, called coracidium III. Shell: Smooth, yellow brown color IV. Features: Operculum on one end, terminal knob on opposite end (Abopercular Knob)
62
Morphology of the adult worm of D. latum?
``` I. Scolex: -Almond Shaped, -Contains two-long prominent, sucking groves II. Gravid Proglottid: -Has wider than long shape -Central uterine location, has a rosette formation ```
63
Classification of Echinococcus granulosus?
Cyclophilidean
64
Common name for E. granulosus
Hydatidworm / Dog | Tapeworm
65
The larval stage of Echinococcus granulosus?
Hydatid Cyst
66
The Intermediate host of Echinococcus granulosus?
I. Sheep/Hogs | II. Man is accidental
67
The Definitive host of Echinococcus granulosus?
Dogs, Foxes/Wolves
68
The Infective stage of Echinococcus granulosus?
Eggs in feces
69
The Diagnostic stage of Echinococcus granulosus?
Hydatid Cysts in Lung and | Liver
70
MORPHOLOGY OF HYDATID CYST (E. granulosus) I. INDISTINGUISHABLE from ______ species eggs II. ______ CYST found in tissue III. Protective Coverings: ___ wall, multiple laminated germinal tissue layers IV. Basic Cyst Makeup: Fluid-filled bladder V. Structures that arise: ______ Cysts VI. In Inner Germinal Layer: ______ Capsule VII. Other Present Structures: Hydatid Sand (Daughter cysts, free solices, hooklets, and miscellaneous materials may evolve in this part)
I. INDISTINGUISHABLE from Taenia species eggs II. HYDATID CYST found in tissue III. Protective Coverings: Cyst wall, multiple laminated germinal tissue layers IV. Basic Cyst Makeup: Fluid-filled bladder V. Structures that arise: Daughter Cysts VI. In Inner Germinal Layer: Brood Capsule VII. Other Present Structures: Hydatid Sand (Daughter cysts, free solices, hooklets, and miscellaneous materials may evolve in this part)
71
MORPHOLOGY OF ADULT WORM (E. granulosus) I. _________ of all the Cestodes (4.5mm) II. Has _____, small neck, three proglottids III. Has four _____ and 36 hooks IV. Has only three segments: (Immature, Mature, Gravid) V. Rare in man, common in _____
I. SHORTEST of all the Cestodes (4.5mm) II. Has scolex, small neck, three proglottids III. Has four suckers and 36 hooks IV. Has only three segments: (Immature, Mature, Gravid) V. Rare in man, common in dogs

Clinical Parasitology (8 decks)

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