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CLINICAL MICROBIOLOGY - PARASITOLOGY (TopnotcherQT) > METAZOANS (Cestodes/TAPEWORMS) > Flashcards

METAZOANS (Cestodes/TAPEWORMS) Flashcards

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1
Q

Anterior end of the body; muscular organ for attachment; “hold fast”

A

Scolex

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2
Q

2 types of scolex:

A
  1. Bothriate
  2. Acetabulate
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3
Q

Spoon, spatulate, or spindle-shaped scolex; has suctorial grooves/sucking grooves’ order pseudophyllidea

A

Bothriate

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4
Q

Quadrate scolex containing 4 muscular suckers; Rostellum; projection at the apex of the scolex armed with hooks or spines

A

Acetabulate

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5
Q

Part behind the scolex; unsegmented; region of growth where strobilation begins

A

Neck

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6
Q

Chain of segments (proglottids)

A

Strobila

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7
Q

The immature segment (immature proglottid) is located at:

A

near the neck

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8
Q

Segment that are filled with eggs; other reproductive organs have atrophied; uterus remain:

A

Gravid segment

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9
Q

Proglottid detaches from the body to release the eggs; order Cyclophyllidea:

A

Apolytic proglottid

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10
Q

Has uterine pores; detaches only after the eggs are released:

A

Anapolytic proglottid

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11
Q

Common name/other name of Diphyllobothrium latum:

A

“fish tapeworm” / |”broad tapeworm”

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12
Q

Common name/other name of Taenia solium

A

“Pork tapeworm”

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13
Q

Common name/other name of Taenia saginata

A

“Beef tapeworm”

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14
Q

Common name/other name of Hymenolepis nana:

A

“Dwarf tapeworm”

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15
Q

Common name/other name of Dipylidium caninum

A

“Dog & cat tapeworm”

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16
Q

Common name/othername of Echinococcus granulosus:

A

“Hydatid tapeworm”

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17
Q

Tapeworm that has no rostellum or hooks but has 4 suckers:

A

Taenia saginata “beef tapeworm”

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18
Q

Knob0like, rudimentary rostellum without hooks:

A

Hymenolepis diminuta

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19
Q

Conical refractile with 1-7 circlets of hooks, has rostellum:

A

Dipylidium caninum

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20
Q

Globular, rostellum with double crown of 30-36 hooks

A

Echinococcus granulosus

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21
Q

Knob-like, short, invaginated rostellum with single row of 20-30 hooks:

A

Hymenolepis nana

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22
Q

Common name/other name of Hymenolepis diminuta:

A

“Rat tapeworm”

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23
Q

Spatulate; No rostellum and hooks:

A

Diphyllobothrium latum

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24
Q

Tapeworms that have broader than long proglottids:

A
  • Diphyllobothrium latum
  • Hymenolepis nana
  • Hymenolepis diminuta
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25
Q

Tapeworms that have Longer than broad proglottids:

A
  • Taenia solium
  • Taenia saginata
  • Echinococcus granulosus
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26
Q

Tapeworm proglottid that has Vase, barrel, cucumber seed, pumpkin seed-shaped with compartmented egg clusters:

A

Dipylidium caninum

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27
Q

Tapeworm with Rosette-shaped, central uterus:

A

Diphyllobothrium latum

28
Q

Tapeworm with7-15 lateral branches:

A

Taenia solium

29
Q

Tapeworm with 15-30 lateral branches:

A

Taenia saginata

30
Q

Tapeworm with sacculate (sac-like) uterus:

A
  • Hymenolepis nana
  • Hymenolepis diminuta
31
Q

Tapeworm with reticulate uterus with egg capsules:

A

Dipylidium caninum

32
Q

Tapeworm with 12-15 lateral branches:

A

Echinococcus granulosus

33
Q

Lateral with REGULAR alternation of genital pore:

A

Taenia solium

34
Q

Lateral with IRREGULAR alternation of genital pore:

A

Taenia saginata

35
Q

Tapeworm with Bilateral/Double-pored genital pore:

A

Dipylidium caninum

36
Q

Unilateral genital pore:

A
  • Hymenolepis nana
  • Hymenolepis diminuta
37
Q

Difference of H. nana and H. diminuta ova:

A

H. nana:
- 2 polar thickenings where 4-8 filaments arise

H. diminuta:
- 2 polar thickenings where NO filaments arise

38
Q

Tapeworm ova that has 8-12 eggs enclosed in a membranous capsule:

A

Dipylidium caninum

39
Q

Operculated; abundant yolk granules, small knob at abopercular end:

A

Diphyllobothrium latum

40
Q

Cystic larvae of T. solium:

A

Cysticercus cellulose

41
Q

Cystic larvae of T. saginata:

A

Cysticercus bovis

42
Q

Tapeworm spp that has two (2) intermediate host:

A

Diphyllobothrium latum

1st: copepods
2nd: fish

43
Q

Tapeworms where man is incidental host:

A
  • Hymenolepis nana
  • Hymenolepis diminuta
  • Dipylidium caninum
  • Echinococcus granulosus
44
Q

MOT of D. latum:

A

Ingestion of plerocercoid (sparganum) on the flesh of infected fish

45
Q

Pathogenesis/Disease caused by D. latum:

A
  • Diphyllobothriasis
  • Megaloblastic anemia 9Vit. B12 deficiency)
46
Q

Diphyllobothrium latum
IS:
DS:

A

Diphyllobothrium latum
IS: Plerocercoid (sparganum) present in infected fish
DS: Ovum

47
Q

New name of Diphyllobothrium mansoni:

A

Spirometra mansoni

48
Q

In Spirometra mansoni, man is the _______ host:

A

Incidental host

49
Q

Definitive host of Spirometra mansoni:

A

Cats and Dogs

50
Q

Pathogenesis of Spirometra mansoni:

A

Sparganosis

51
Q

Extraintestinal infection of Spirometra mansoni:

A

Most commonly in:
1. Eyes
2. Thorax
3. Abdomen

52
Q

MOT of T. saginata:

A

T. saginata
MOT: ingestion of Cysticercus bovis in infected beef

53
Q

Taenia saginata
IH:
DH:

A

Taenia saginata
IH: Cow
DH: Man

54
Q

Pathogenesis of T. saginata:

A

Taeniasis (adult stage infection)
Intestinal obstruction

55
Q

MOT of T. solium:

A

Taenia solium
MOT: ingestion of Cysticercus cellulose in infected pork; ingestion of eggs; autoinfection possible

56
Q

Pathogenesis of Taenia solium:

A
  • Taeniasis (adult stage infection)
  • Cysticercosis (Larval stage infection)
57
Q

T. solium taeniasis
IH:
DH:
IS:

A

T. solium taeniasis
IH: Pig/Swine
DH: Human
IS: Cystic larvae

58
Q

T. solium cysticercosis
IH:
IS:

A

T. solium cysticercosis
IH: Human
IS: Egg/Ovum

59
Q

Extraintestinal infection of Cysticercosis caused by T. solium;

A

Extraintestinal infection (T. solium)
1. Brain
2. Eyes
3. Subcutaneous tissue

60
Q

Hymenolepis nana
MOT:
IH:
DH:
AH:
IS:
DS:

A

Hymenolepis nana
MOT: ingestion of cysticercoid in an infected rat flea
IH: Rat flea
DH: Man
AH: Rat (accidental host)
IS: Embryonated egg
DS: Embryonated egg

Note: can cause INTERNAL AUTOINFECTION - some eggs can hatch inside the intestine

61
Q

Hymenolepis diminuta
MOT:
IH:
DH:
AH:

A

Hymenolepis diminuta
MOT: ingestion of cysticercoid in an infected arthropod
IH: Arthropod
DH: Rat
AH: Man

Note: Autoinfection is not possible

62
Q

Diagnostic problem for Dipylidium caninum:

A

gravid proglottid resemble rice grains (dry) or cucumber seeds (moist)

63
Q

Echinococcus granulosos
MOT:
IH:
DH:
Accidental Host:
DS:

A

Echinococcus granulosos
MOT: ingestion of egg
IH: Sheep
DH: Canines
Accidental Host: Man
DS: Hydatid cyst in tissue (usually liver)

64
Q

Diagnostic procedures for Echinococcus granulosus infection:

A
  • Tissue biopsy
  • CT scan (& other radiologic procedures)
  • Casoni’s intradermal test
65
Q

Echinococcus multiocularis
IH:
DH:
Accidental Host:
MOT:

A

Echinococcus multiocularis
IH: Rodents (e.g. mice)
DH: Foxes, wolves (canines)
Accidental Host: Man
MOT: Ingestion of egg (ova)

Note: Extraintestinal infection - most commonly infects the LIVER

CLINICAL MICROBIOLOGY - PARASITOLOGY (TopnotcherQT) (16 decks)

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