Parasitology > Fluke identification > Flashcards

Fluke identification Flashcards

(29 cards)

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1
Q

Identify the parasite based on egg morphology

  • Hen’s egg appearance
  • Rounded
  • Ovoid
  • Brownish
  • Operculated
  • Immature when laid
A

Fasciola

since eggs of Fasciola are morphologically similar with Fasciolopsis, u may ans Fasciolopsis too

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2
Q

Identify the parasite based on egg morphology

  • Germ ball egg
  • smaller than Fasciola/Fasciolopsis but large ones look like them
  • Conspicuous operculum
  • Immature when laid
A

Echinostoma spp.

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3
Q

Identify the parasite based on egg morphology

  • Yellowish-brown
  • Ovoid; elongated
  • Pitcher-like structure
  • Old-fashioned lightbulb
  • Well-defined opercular shoulders
  • Comma-shaped abopercular end
  • Operculated
  • Mature when laid
A

Clonorchis sinensis

Morphologically the same w/ Opisthorchis and Heterophyids nag-iiba lang sa abopercular end

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4
Q

Identify the parasite based on egg morphology

  • Yellowish-brown
  • Ovoid; elongated
  • Pitcher-like structure
  • Old-fashioned lightbulb
  • Well-defined opercular shoulders
  • Thickened abopercular end/abopercular knob
  • Narrow
  • Operculated
  • Mature when laid
A

Opisthorchis spp.

Morphologically the same w/ Opisthorchis and Heterophyids nag-iiba lang sa abopercular end (and if narrow or no)

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5
Q

Identify the parasite based on egg morphology

  • Yellowish-brown
  • Ovoid; elongated
  • Pitcher-like structure
  • Old-fashioned lightbulb
  • Well-defined opercular shoulders
  • No abopercular end
  • Operculated
  • Mature when laid
A

Heterophyids spp.

Heterophyids = H. heterophyes & M. yokogawai

Morphologically the same w/ Opisthorchis and Heterophyids nag-iiba lang sa abopercular end (and if narrow or no)

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6
Q

Identify the parasite based on egg morphology

  • Small
  • Dark brown in color
  • Thick-shelled
  • Elongated
  • Narrow-bodied
  • Operculated
  • Mature when laid
A

Dicrocoelium dendriticum

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7
Q

Identify the parasite based on egg morphology

  • similar to lancet fluke
    —————eto lancet fluke—————–
  • Small
  • Dark brown in color
  • Thick-shelled
  • Elongated
  • Narrow-bodied
  • Operculated
  • Mature when laid
A

Eurytrema pancreaticum

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8
Q

Identify the parasite based on egg morphology

  • oval
  • yellowish-brown
  • with flattened but prominent operculum
  • thickened abopercular protuberance
  • similar to Diphyllobothrium latum
A

Paragonimus westermani

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9
Q

Identify the parasite based on egg morphology

  • more rounded/oval than other spp.
  • Rudimentary/Minute lateral spine
  • Acid-fast positive
A

Schistosoma japonicum

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10
Q

Identify the parasite based on egg morphology

  • Elongated
  • Prominent lateral spine (near the posterior end)
  • Acid-fast positive
A

Schistosoma mansoni

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11
Q

Identify the parasite based on egg morphology

  • Elongated
  • Terminal spine
  • Acid-fast negative
A

Schistosoma haematobium

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12
Q

Identify the parasite based on egg morphology

  • Elongated
  • Terminal spine
  • Acid-fast positive
  • often has a central bulge
  • hourglass appearance
A

Schistosoma intercalatum

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13
Q

Identify the parasite based on egg morphology

  • oval
  • minute lateral spine
  • smaller than japonicum
A

Schistosoma mekongi

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14
Q

Identify the parasite based on adult worm morphology

  • Spatulate appearance
  • Acetabulum is smaller than the oral sucker
  • Vitellaria is found in the middle third of the body
  • Simple intestinal ceca reaching until the posterior end
  • branched testes in tandem positioned posteriorly
  • lobate ovary
A

Clonorchis sinensis

almost the same Clonorchis sinensis, Opisthorchis spp., and Dicrocoelium dendriticum but just look at testes description and location!
- C. sinensis = testes is branched in tandem; posterior
- Opisthorchis = testes is lobed arranged obliquely; posterior
- D. dendriticum = testes is lobed; anterior

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15
Q

Identify the parasite based on adult worm morphology

  • Spatulate appearance
  • Acetabulum is larger than the oral sucker (O< V)
  • Vitellaria is found in the middle third of the body
  • Simple intestinal ceca reaching until the posterior end
  • lobate testes arranged obliquely; posterior
  • lobate ovary
A

Opisthorchis spp.

almost the same Clonorchis sinensis, Opisthorchis spp., and Dicrocoelium dendriticum but just look at testes description and location!
- C. sinensis = testes is branched in tandem; posterior
- Opisthorchis = testes is lobed arranged obliquely; posterior
- D. dendriticum = testes is lobed; anterior

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16
Q

Identify the parasite based on adult worm morphology

  • Spatulate appearance; Lancet-shaped
  • Simple intestinal ceca
  • Lobed testes in tandem positioned anteriorly
  • Lobate ovary just behind the testes
  • Oral sucker larger than ventral sucker
  • Vitellaria positioned in the midportion (laterally)
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A

Dicrocoelium dendriticum

almost the same Clonorchis sinensis, Opisthorchis spp., and Dicrocoelium dendriticum but just look at testes description and location!
- C. sinensis = testes is branched in tandem; posterior
- Opisthorchis = testes is lobed arranged obliquely; posterior
- D. dendriticum = testes is lobed; anterior

17
Q

Identify the parasite based on adult worm morphology

  • large; long
  • has a cephalic cone on its anterior
  • prominent “shoulders”
  • branched intestinal ceca
  • branched testes in tandem; posterior
  • branched ovary
  • lateral vitellaria (whole body)
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A

Fasciola hepatica

We can differentiate Fasciola from Fasciolopsis by:
1. cephalic cone
2. intestinal ceca
3. larger ventral sucker than oral

18
Q

Identify the parasite based on adult worm morphology

  • large; longer than the other one w/ cephalic cone
  • has a cephalic cone on its anterior
  • less prominent “shoulders”
  • branched intestinal ceca
  • branched testes in tandem; posterior
  • branched ovary
  • lateral vitellaria (whole body)
  • oral sucker larger than ventral sucker
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A

Fasciola gigantica

We can differentiate Fasciola from Fasciolopsis by:
1. cephalic cone
2. intestinal ceca
3. larger ventral sucker than oral (Fasciolopsis)

19
Q

Identify the parasite based on adult worm morphology

  • lateral vitellaria (whole body)
  • no cephalic cone
  • no shoulders
  • simple intestinal ceca
  • ventral sucker larger than oral
  • branched testes in tandem; posterior
  • branched ovary (middle)
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A

Fasciolopsis buski

We can differentiate Fasciola from Fasciolopsis by:
1. cephalic cone
2. intestinal ceca
3. larger ventral sucker than oral

20
Q

Identify the parasite based on adult worm morphology

  • reddish-gray worm
  • tapered posterior end
  • spatulate in shape
  • presense of circumoral disk (ccollar spine)
  • simple intestinal ceca
  • ventral sucker larger than oral
  • lobed testes in tandem
  • single lobate ovary
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A

Echinostoma ilocanum

Arty vs Echino = tapered or posterior end
Echinostoma ilocanum = tapered end
Artyfechinostomum malayanum = rounded end

21
Q

Identify the parasite based on adult worm morphology

  • rounded posterior end
  • spatulate in shape
  • presense of circumoral disk (ccollar spine)
  • simple intestinal ceca
  • ventral sucker larger than oral
  • lobed testes in tandem
  • single lobate ovary
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A

Artyfechinostomum malayanum

Arty vs Echino = tapered or posterior end
Echinostoma ilocanum = tapered end
Artyfechinostomum malayanum = rounded end

22
Q

Identify the parasite based on adult worm morphology

  • Avocado/Pear-shaped
  • Ventral sucker larger than oral
  • Gonotyl located near the acetabulum
  • Lobed testes located posteriorly
  • Simple intestinal ceca
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A

Heterophyes heterophyes

23
Q

Identify the parasite based on adult worm morphology

  • Avocado/Pear-shaped
  • Ventral sucker larger than oral
  • Lobed testes located posteriorly
  • Absense of gonotyl
  • Simple intestinal ceca
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A

Metagonimus yokogawai

24
Q

Identify the parasite based on adult worm morphology

  • pear-shaped
  • flattened ventral surface
  • enlarged posterior end
  • ventral sucker larger than oral sucker
  • Simple intestinal ceca
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A

Gastrodiscoides hominis

xori wala aqng mapagkunan ahahaha

25
# Identify the parasite based on adult worm morphology - coffee bean-shaped; spoon-shaped - branching testes - ventral sucker almost equal in size w/ oral sucker - lobed ovary - branched and wavy intestinal ceca
*Paragonimus westermani* ## Footnote sabi ni ma'am diana lobed testes daw but cdc & other ol sources claimed branching [cdc paragonimiasis](https://www.cdc.gov/dpdx/paragonimiasis/index.html) [zoology smth](https://parasitology.ou.ac.lk/paragonimus-westermani-lung-fluke-adult/)
26
# Identify the parasite based on adult worm morphology - reddish-brown - leaf-shaped - with ruffled borders - oral sucker is larger than the ventral sucker - two notched testes - one notched ovary - branched intestinal ceca
*Eurytrema pancreaticum*
27
# Identify the parasite based on adult worm morphology **male** - no integumentary tuberculation - 6-8 testes **female** - slender body - centrally located ovary | male + female so u must know na this is a *Schistosoma*
*Schistosoma japonicum*
28
# Identify the parasite based on adult worm morphology **male** - Prominent integumentary tuberculation - 8-9 testes **female** - slender body - anterior ovary | male + female so u must know na this is a *Schistosoma*
*Schistosoma mansoni*
29
# Identify the parasite based on adult worm morphology **male** - Fine integumentary tuberculation - 4-5 testes **female** - slender body - posterior ovary | male + female so u must know na this is a *Schistosoma*
*Schistosoma haematobium*
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