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DTMH - Parasitology & Entomology Slides > Trematodes (Flukes) > Flashcards

Trematodes (Flukes) Flashcards

1
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 30 mm) to the genus level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Fasciola hepatica
  2. Characteristic large and broadly flattened fluke
    * Within the size range (up to 30 x 15 mm) for F. hepatica sp. adults
    * Located in biliary ducts where F. hepatica reside
    * Cone shaped anterior end (unlike rounded end of F. buski)
  3. Snail
  4. Sheep, cattle
  5. Consuming watercress that are encysted with metacercariae
  6. Triclabendazole
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2
Q
  1. Name this parasite (size: 25 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Opthisthorchis spp.
  2. Characteristic egg
    * Within the size range (19-30 um) for Opthisthorchis sp.
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
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3
Q
  1. Name this parasite (size: 112 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic ovoid/elongated egg
    * Within the size range (80-120 um) for Paragonimus eggs
    * Operculum
    * Thick shell
    * Unembryonated
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
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4
Q
  1. Name this parasite (size: 9 mm) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Echinostoma
  2. Features:
    * Within size range (2-10 mm long by 1-2 mm wide) for Echinostoma sp.
    * Single ovary next to paired testes
    * Oral sucker surrounded by a collar of spines
  3. Snail (1st) -> Snail (2nd) or Frog (2nd)
  4. Ducks, rodents
  5. Ingesting snails or frogs encysted with metacercariae
  6. Praziquantel
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5
Q
  1. Name this parasite (size: 105 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic ovoid/elongated egg
    * Within the size range (80-120 um) for Paragonimus eggs
    * Operculum
    * Thick shell
    * Unembryonated
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
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6
Q
  1. Name this parasite (size: 134 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciolopsis buski (or report as Fasciola/Fasciolopsis)
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. buski eggs
    * Operculum
    * Lack of roughened/irregular abopercular area
    * Unembryonated
  3. Snail
  4. Pigs
  5. Consuming aquatic plants that are encysted with metacercariae
  6. Praziquantel

N.b. may report as Fasciola/Fasciolopsis and have to identify based on serology or morphology and location of the adult fluke

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7
Q

A histological section of lung tissue is shown

  1. Name this parasite (size: 93 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic ovoid/elongated egg
    * Within the size range (80-120 um) for Paragonimus eggs
    * Operculum
    * Thick shell
    * Unembryonated
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
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8
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 7 mm) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Opisthorchis sp.
  2. Characteristic flattened, lanced-shape fluke
    * Within the size range (7 mm) for Opisthorchis sp. adults
    * Located in biliary ducts where Opisthorchis reside
    * Rounded testes (vs highly branched in Clonorchis)
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
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9
Q

This specimen was retrieved during a bronchoscopy

  1. Name this parasite (size: 9 mm) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic large ovoid adult fluke
    * Within the size range (7-15 mm) for Paragonimus adults
    * Contains two branching testes
    * Retrieved from the lungs where adult Paragonimus reside
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
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10
Q
  1. Name this parasite (size: 141 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciola hepatica
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. hepatica eggs
    * Operculum
    * Roughened/irregular abopercular end
    * Unembryonated
  3. Snail
  4. Sheep, cattle
  5. Consuming watercress that are encysted with metacercariae
  6. Triclabendazole

N.b. may report as Fasciola/Fasciolopsis and have to identify based on morphology and location of the adult fluke

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11
Q

This specimen was retrieved during a bronchoscopy

  1. Name this parasite (size: 12 mm) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic large ovoid adult fluke
    * Within the size range (7-15 mm) for Paragonimus adults
    * Contains two branching testes
    * Retrieved from the lungs where adult Paragonimus reside
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
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12
Q
  1. Name this parasite (size: 36 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Dicrocoelium sp
  2. Features
    * Ovoid egg within size range (35-45 um) of Dicrocoelium
    * Operculum
    * Thick shell
    * Fully embryonated
  3. Snail (1st); Ant (2nd)
  4. Cattle
  5. Ingesting infected ants
  6. Praziquantel
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13
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 12 mm) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic flattened, lanced-shape fluke
    * Within the size range (10-25 mm) for C. sinensis adults
    * Located in biliary ducts where C. sinensis reside
    * Highly branched testes (vs rounded in Opisthorchis)
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
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14
Q
  1. Name this parasite (size: 97 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic ovoid/elongated egg
    * Within the size range (80-120 um) for Paragonimus eggs
    * Operculum
    * Thick shell
    * Unembryonated
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel
How well did you know this?
1
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2
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15
Q
  1. Name this parasite (size: 33 um) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic egg
    * Within the size range (27-35 um) for C. sinensis
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
How well did you know this?
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16
Q
  1. Name this parasite (size: 148 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciola hepatica
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. hepatica eggs
    * Operculum
    * Roughened/irregular abopercular end
    * Unembryonated
  3. Snail
  4. Sheep, cattle
  5. Consuming watercress that are encysted with metacercariae
  6. Triclabendazole

N.b. may report as Fasciola/Fasciolopsis and have to identify based on morphology and location of the adult fluke

17
Q
  1. Name this parasite (size: 141 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciolopsis buski (or report as Fasciola/Fasciolopsis)
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. buski eggs
    * Operculum
    * Lack of roughened/irregular abopercular area
    * Unembryonated
  3. Snail
  4. Pigs
  5. Consuming aquatic plants that are encysted with metacercariae
  6. Praziquantel
    ​
    N.b. may report as Fasciola/Fasciolopsis and have to identify based on serology or morphology and location of the adult fluke
18
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 18 mm) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic flattened, lanced-shape fluke
    * Within the size range (10-25 mm) for C. sinensis adults
    * Located in biliary ducts where C. sinensis reside
    * Highly branched testes (vs rounded in Opisthorchis)
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
19
Q
  1. Name this parasite (size: 34 um) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic egg
    * Within the size range (27-35 um) for C. sinensis
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
20
Q
  1. Name this parasite (size: 148 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciolopsis buski (or report as Fasciola/Fasciolopsis)
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. buski eggs
    * Operculum
    * Lack of roughened/irregular abopercular area
    * Unembryonated
  3. Snail
  4. Pigs
  5. Consuming aquatic plants that are encysted with metacercariae
  6. Praziquantel
    ​
    N.b. may report as Fasciola/Fasciolopsis and have to identify based on serology or morphology and location of the adult fluke
21
Q
  1. Name this parasite (size: 106 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Echinostoma
  2. Features:
    * Within size range (80-135 um) for Echinostoma sp.
    * Inconspicuous operculum
    * Thickened aboperculum
  3. Snail (1st) -> Snail (2nd) or Frog (2nd)
  4. Ducks, rodents
  5. Ingesting snails or frogs encysted with metacercariae
  6. Praziquantel
22
Q
  1. Name this parasite (size: 26 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Opthisthorchis spp.
  2. Characteristic egg
    * Within the size range (19-30 um) for Opthisthorchis sp.
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
23
Q

This specimen was retrieved during an upper GI endoscopy/

  1. Name this parasite (size: 30 mm) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciolopsis buski
  2. Characteristic broadly flattened fluke
    * Within the size range (20-75 mm) for F. buski adults
    * Rounded anterior end
    * Retrieved from intestines where F. buski adults reside
  3. Snail
  4. Pigs
  5. Consuming aquatic plants that are encysted with metacercariae
  6. Praziquantel
24
Q
  1. Name this parasite (size: 42 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Dicrocoelium sp
  2. Features
    * Ovoid egg within size range (35-45 um) of Dicrocoelium
    * Operculum
    * Thick shell
    * Fully embryonated
  3. Snail (1st); Ant (2nd)
  4. Cattle
  5. Ingesting infected ants
  6. Praziquantel
25
Q
  1. Name this parasite (size: 35 um) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic egg
    * Within the size range (27-35 um) for C. sinensis
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
26
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 27 mm) to the genus level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciola hepatica
  2. Characteristic large and broadly flattened fluke
    * Within the size range (up to 30 x 15 mm) for F. hepatica sp. adults
    * Located in biliary ducts where F. hepatica reside
    * Cone shaped anterior end (unlike rounded end of F. buski)
  3. Snail
  4. Sheep, cattle
  5. Consuming watercress that are encysted with metacercariae
  6. Triclabendazole
27
Q
  1. Name this parasite (size: 32 um) to the species level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Clonorchis sinensis
  2. Characteristic egg
    * Within the size range (27-35 um) for C. sinensis
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
28
Q
  1. Name this parasite (size: 134 um) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciola hepatica
  2. Characteristic ellipsoidal egg
    * Within the size range (130-150 um) for F. hepatica eggs
    * Operculum
    * Roughened/irregular abopercular end
    * Unembryonated
  3. Snail
  4. Sheep, cattle
  5. Consuming watercress that are encysted with metacercariae
  6. Triclabendazole

N.b. may report as Fasciola/Fasciolopsis and have to identify based on morphology and location of the adult fluke

29
Q

This specimen was retrieved during a colonoscopy

  1. Name this parasite (size: 35 mm) to the species level
  2. State your reasons
  3. Name one intermediate host for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Fasciolopsis buski
  2. Characteristic broadly flattened fluke
    * Within the size range (20-75 mm) for F. buski adults
    * Rounded anterior end
    * Retrieved from intestines where F. buski adults reside
  3. Snail
  4. Pigs
  5. Consuming aquatic plants that are encysted with metacercariae
  6. Praziquantel
30
Q
  1. Name this parasite (size: 22 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Opthisthorchis spp.
  2. Characteristic egg
    * Within the size range (19-30 um) for Opthisthorchis sp.
    * Operculum resting on ‘shoulders’
    * Abopercular knob
    * Containing a mature miracidium
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
31
Q

This specimen was retrieved during an ERCP

  1. Name this parasite (size: 7 mm) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. How do humans become infected with this parasite
  5. Name one drug used to treat infection with this parasite
A
  1. Opisthorchis sp.
  2. Characteristic flattened, lanced-shape fluke
    * Within the size range (7 mm) for Opisthorchis sp. adults
    * Located in biliary ducts where Opisthorchis reside
    * Rounded testes (vs highly branched in Clonorchis)
  3. Snail; Freshwater fish
  4. Consuming freshwater fish that are encysted with metacercariae
  5. Praziquantel
32
Q

A histological section of lung tissue is shown

  1. Name this parasite (size: 107 um) to the genus level
  2. State your reasons
  3. Name two intermediate hosts for this parasite
  4. Name one non-human definitive host for this parasite
  5. How do humans become infected with this parasite
  6. Name one drug used to treat infection with this parasite
A
  1. Paragonimus sp (e.g. westermani)
  2. Characteristic ovoid/elongated egg
    * Within the size range (80-120 um) for Paragonimus eggs
    * Operculum
    * Thick shell
    * Unembryonated
  3. Snail, crab/crayfish
  4. Pigs, dogs, cats
  5. Consuming undercooked or pickles crab/crayfish with encysted metacercariae
  6. Praziquantel

DTMH - Parasitology & Entomology Slides (20 decks)

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