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PARASITOLOGY > FINALS: INTESTINAL CESTODES I > Flashcards

FINALS: INTESTINAL CESTODES I Flashcards

1
Q

This Phylum is composed of two parasitic classes

A

PLATYHELMINTHES

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2
Q

PLATYHELMINTHES Phylum is composed of two parasitic
classes:

A
  1. TREMATODA – flukes
  2. CESTODA
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3
Q

FALSE TAPEWORM

A

PSEUDOPHYLLIDEA

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4
Q

TRUE TAPEWORM

A

CYCLOPHYLLIDEA

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5
Q

Long, flat and ribbon-like appearance

A

CESTODES

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6
Q

Important parts include of CESTODES:

A
  • ROSTELLUM
  • SCOLEX
  • PROGLOTTIDS
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7
Q

 May have hooks/hooklets
 Crown of the scolex

A

ROSTELLUM

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8
Q

organ of attachment

A

Scolex

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9
Q

Contains the suckers (4 cup-shaped
structures)

A

SCOLEX

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10
Q

For intestinal mucosa attachment

A

SUCKERS

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11
Q

in between scolex and proglottid

A

Neck

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12
Q

Segments of the cestode

A

PROGLOTTIDS

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13
Q

PROGLOTTIDS Formed via?

A

budding

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14
Q

chain of proglottids

A

STROBILA

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15
Q

PROGLOTTIDS Divided into 3 parts:

A

IMMATURE PROGLOTTIDS
MATURE PROGLOTTIDS
GRAVID PROGLOTTIDS

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16
Q

anterior part found nearest to the neck (no egg)

A

IMMATURE PROGLOTTIDS

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17
Q

differentiated with immature sexual organs

A

IMMATURE PROGLOTTIDS

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18
Q

middle; where reproductive structure and organs are found

A

MATURE PROGLOTTIDS

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19
Q

contains male and female genital organs (hermaphroditic)

A

MATURE PROGLOTTIDS

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20
Q

posterior part (pregnant); production of eggs; farthest from the egg

A

GRAVID PROGLOTTIDS

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21
Q

contains fully developed uterus with eggs

A

GRAVID PROGLOTTIDS

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22
Q

Equipped with male and female organs

A

PROGLOTTIDS

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23
Q

self fertilizing

A

HERMAPHRODITIC

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24
Q

filled with eggs

A

GRAVID

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25
Q

Cestodes may absorb nutrients and
excrete waste via ____ (body
covering)

A

TEGUMENT

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26
Q

SCOLEX: Spoon-shaped with
bothria (sucking grooves); hooklets
absent

A

PSEUDOPHYLLIDEA

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27
Q

SCOLEX: Rostellum with or w/o hooklets

A

CYCLOPHYLLIDEA

28
Q

STROBILA: (ANAPOLYTIC) non-shedding segments

A

PSEUDOPHYLLIDEA

29
Q

STROBILA: (APOLYTIC) shed segments

A

CYCLOPHYLLIDEA

30
Q

INTESTINAL CESTODES I:

A

 Taenia saginata
 Taenia solium
 Hymenolepis nana
 Hymenolepis diminuta

31
Q

 “BEEF TAPEWORM”
 Longest tapeworm
 Definitive host: HUMANS

A

Taenia saginata

32
Q

 3rd Taenia species that is related to T. saginata
 Reported in Taiwan, Korea, Thailand, and Indonesia

A

Taenia asiatica (cysticercus viscerotropica)

33
Q

found in the liver of intermediate host (pigs, cattle, goats, wild boars and monkeys)

A

Cysticercus viscerotropica Larvae

34
Q

“PORK TAPEWORM”

A

Taenia solium

35
Q

Taenia solium definitive and intermediate host:

36
Q

is acquire from eating pork with cysticerci which will become an adult worm

37
Q

ingestion of egg then hatched into oncosphere and develop into cysticerci in which it will attached in the tissue

A

cysticercosis

38
Q

HABITAT: Upper small intestine

A

Taenia solium

39
Q

HABITAT: Upper jejunum and live for up to 25 years

A

Taenia saginata

40
Q

SCOLEX: Spherical with
acetabula (suckers); 1mm

A

Taenia solium

41
Q

SCOLEX: Cuboidal with four acetabula (suckers); 1-2 mm

A

Taenia saginata

42
Q

ROSTELLUM: Present, cushion-like, doublecrowned (2530 large & small hooks)

A

Taenia solium

43
Q

ROSTELLUM: ABSENT

A

Taenia saginata

44
Q

NO. OF SEGMENTS: 800 -1,000

A

Taenia solium

45
Q

NO. OF SEGMENTS: 1,000-4,000

A

Taenia saginata

46
Q

ACTS OF SEGMENTS: Not observed

A

Taenia solium

47
Q

ACTS OF SEGMENTS: Active crawling

A

Taenia saginata

48
Q

NO. OF OVA PER GRAVID PROGLOTTID: 30,000 –50,000 per proglottid

A

Taenia solium

49
Q

NO. OF OVA PER GRAVID PROGLOTTID: 97,000 – 124, 000
per proglottid

A

Taenia saginata

50
Q

GRAVID PROGLOTTID: Wider and shorter

A

Taenia solium

51
Q

GRAVID PROGLOTTID: Longer

A

Taenia saginata

52
Q

Absence of vaginal sphincter

A

Taenia solium

53
Q

Vagina with sphincter

A

Taenia saginata

54
Q

 Spherical/subspherical  Eggs of T. solium is indistinguishable of T. saginata
 30-45 um  Thick embryopore: Brownish and striated radially (due to numerous pits)
 Contains the oncosphere (embryo with 3 pairs of hooklets (6 total))
 Infective stage of cysticercosis (in solium)

55
Q

– infection which encyst in the tissue

A

Cysticercosis

56
Q

 Larval stages  In the tissues of Intermediate hosts  Infective stage (both solium & saginata)
 Transmitted from improperly cooked pork/beef

A

CYSTICERCOID/CYSTICERCI

57
Q

CYSTICERCUS BOVIS

A

Taenia saginata

58
Q

CYSTICERCUS CELLULOSAE

A

Taenia solium (“MEASLY PORK”)

59
Q

CYSTICERCUS VISCEROTROPICA

A

Taenia asiatica

60
Q

IH: CATTLE

A

Taenia saginata

61
Q

IH: PORK

A

Taenia solium

62
Q

 INTESTINAL INFECTION
o NONSPECIFIC SYMPTOMS:

A
  • Epigastric pain
  • GI Discomfort - Hunger pangs - Weakness - Weight loss - Loss of apetite - Pruritus
63
Q

Obstruction of bile, pancreatic ducts and appendix (due to motile proglottids)

A

T.saginata

64
Q

No obstruction

65
Q

o Taenia solium
 Cysticerci often multiple and may occur in any organ/tissue (can survive up to 5years)

A

CYSTICERCOSIS

66
Q

CYSTICERCOSIS can affect these organs/tissues:

A
  • Brain - Striated muscle - Subcutaneous tissue - Eye - Heart - Lung - Peritoneum
67
Q

o Taenia solium
 MOST SERIOUS MANIFESTATION  Considered as ONE OF THE MOST SERIOUS ZOONOTIC DISEASE WORLWIDE
 Cysticerci can be found in the brain parenchyma or floats freely in the ventricles of the brain

A

NEUROCYSTICERCOSIS

PARASITOLOGY (12 decks)

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