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Trematodes Flashcards

1
Q

Phylum of tramatodes

A

Platyhelminthes

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2
Q

Characteristic of all trematodes except blood flukes

A

Flat, leaf like
Hermaphrodite
Egg: operculated
MOT: ingestion
IS: metacercaria
IH: 2 IH

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3
Q

Characteristic of Schistosomes

A

Elongated and cylindrical
Separate sexes
Egg: non operculated
MOT: skin penetration
IS: cercaria
IH: 1 IH ( snail )

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4
Q

Eggs mature when laid (embryonated) : SHOC

A

Schistosoma
Heterophyes
Opistorchis
Clonorchis

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5
Q

Eggs are Immature when laid (unembryonated) : PEFF

A

Paragonimus
Echinostoma
Fasciola
Fasciolopsis

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6
Q

2 suckers used as attachment by trematodes

A

Oral and ventral (acetabulum)

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7
Q

Heterophyes 3rd attachment

A

Genital sucker

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8
Q

Life cycle of trematodes

A

Egg>Larva(Miracidium>Sporocyst>Redia>Cercaria>Metacercaria)>Adult

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9
Q

1st IH of trematodes

A

Snail

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10
Q

2nd IH of trematode

A

Fish, crab, plant/vegetation, snail

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11
Q

Fish are the 2nd IH of these Trematodes: SHOC

A

Schistosoma
Heteophyes
O. Felineus
C. Sinensis

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12
Q

2nd IH are snails

A

E. Ilocanum

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13
Q

2nd IH are plant/vegetation of these trematodes

A

F. Hepatica
F. Gigantica
F. Buski

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14
Q

Liver trematodes

A

F. Hepatica
F. Gigantica
C. Sinensis
O. Felineus

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15
Q

Small intestine trematodes

A

F. Buski
E. Ilocanum
H. Heterophyes

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16
Q

Lung trematode

A

P. Westermani

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17
Q

Causes sheep liver rot

A

Fasciola hepatica

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18
Q

Adult characteristics of F. Hepatica

A

With cephalic cone
Leaf like hermaphrodite

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19
Q

Most important liver fluke of man

A

Clonorchis sinensis

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20
Q

Egg characteristics of C. Sinensis

A

Old fashioned electric light bulb

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21
Q

MOT of C. Sinensis

A

Ingestion

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22
Q

Resembles C. Sinensis

A

Opistorchis felineus

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23
Q

Largest fluke parasitizing man

A

Fasciolopsis buski

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24
Q

Egg characteristics of F. Buski

A

Hen’s egg shaped
Indistinguishable from fasciola

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25
Q

Smallest but deadliest fluke of man

A

Heterophyes Heterophyes

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26
Q

MOT of H. Heterophyes

A

Ingestion

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27
Q

Causes endemic hemoptysis

A

Paragonimus westermani

28
Q

Egg characteristics of P. Westermani

A

With thickened abopercular end opposite the operculum

29
Q

Lab diagnosis of P. Westermani

A

Sputum and stool exam

30
Q

MOT of P. Westermani

31
Q

Most romantic parasite of man

A

Schistosoma

32
Q

Adult characteristics of schistosoma

A

Male: with gynecophoral canal where the female is held

33
Q

Lab diagnosis of Schistosoma

A
  1. Demonstration of eggs in feces, rectal or liver biopsies and urine
  2. Faust and Meleney’s eggs hatching technique
  3. Circumoval precipitin test (COP)
34
Q

Pathology of Schistosoma

A

Larva Penetration
Human sp: slight allergic reaction
Nonhuman sp: Swimmer’s itch
Tissue damage by eggs

35
Q

Causes Katayama’s disease

A

S. Japonicum

36
Q

Habitat of S. Japonicum

A

Superior mesenteric veins in the small intestines

37
Q

Egg characteristics of S. Japonicum

A

With small knob-like or recurved hook on one side

38
Q

IH of S. Japonicum

A

Oncomelania quadrasi

39
Q

Smallest blood fluke

A

Schistosoma mansoni

40
Q

Habitat of S. Mansoni

A

Superior mesenteric veins of the colon

41
Q

Vesical blood fluke causing bilharziasis or urinary schistosomiasis ( hematuria)

A

Schistosoma haematobium

42
Q

Specimen for S. Haematobium

A

24 hr unpreserved urine

43
Q

Cestode body

A

Scolex, neck, strobila

44
Q

Anterior attachment organn

45
Q

Region of growth

46
Q

Chains of segments or oroglottids

47
Q

False tapeworm

A

Pseudophyllidea

48
Q

Stages of Pseudophyllidea

A

Coracidiu,>Procercoid>Plerocercoid

49
Q

Scolex of Pseudophyllidea

A

Spoon shaped with bothria

50
Q

Strobila of Pseudophyllidea

A

Anapolytic (not shedding segments)

51
Q

Egg of Pseudophyllidea

A

Operculated with aboperculum, immature when laid

52
Q

True tapeworm

A

Cyclophyllidea

53
Q

Scolex of Cyclophyllidea

A

Quadrate with 4 cuplike suckers (rostellum with or without hooklets)

54
Q

Strobila of Cyclophyllidea

A

Apolytic (shedding segments)

55
Q

Egg of Cyclophyllidea

A

Non-operculated, embryonated (mature when laid) hexacanth embryo

56
Q

Largest tapeworm of man
Causes Vit B12 deficiency anemia

A

Diphyllobothrium latum

57
Q

Scolex of T. Saginata

A

None, no rostellar hooks

58
Q

Scolex of T. Solium

A

With rostellum armed with 2 rows of large and small hooklets

59
Q

Characteristic of eggs of T. Saginata and T. Solium

A

Spherical, striated, inside is an embryo with 6 hooklets

60
Q

Pathogenesis of T. Solium

A

Taeniasis solium and cysticercosis

61
Q

Pathogenesis of T. Saginata

A

Taeniasis saginata

62
Q

Scolex of H. Nana

A

With rostellum armed with a ring of 20-30 spines

63
Q

Scolex of H. Diminuta

A

With oncosphere enclosed in an inner membrane with 2 polar thickenings, but w/o filaments

64
Q

Proglottids With double set of reproductive organs and genital pore on each side of the lateral margin

A

Dipylidium caninum

65
Q

Shortest tapeworm. Anti-Tp1

A

E. Granulosis

66
Q

Intermediate host of E. Granulosis
Definitive host of E. Granulosis

A

IH: sheep man
DH: Dog

67
Q

Lab diagnosis of E. Granulosis

A
  1. Exploratory cyst puncture
  2. Roentgenogram
  3. Immunologic test: Bentonite flocculation test & Casoni

Parasitology (5 decks)

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