UAMS Parasitology Exam 1 UPDATED ACTUAL
Questions and CORRECT Answers
TREMATODES - Flukes
Common names for the following parasites:
TREMATODES - Flukes
Fasciolopsis buski - Intestinal or Giant Intestinal Fluke
Common names for the following parasites:
Fasciola hepatica - Sheep Liver Fluke or Liver Fluke
Fasciolopsis buski
Fasciola hepatica Clonorchis sinensis - Chinese Liver Fluke
Clonorchis sinensis
Paragonimus westermani Paragonimus westermani - Oriental Lung Fluke
Schistosoma mansoni
Schistosoma japoninum Schistosoma mansoni - Blood fluke (liver sinuses & intestinal tract)
Schistosoma haematobium
Schistosoma japoninum - Blood fluke (liver sinuses & intestinal tract)
Schistosoma haematobium - Blood fluke (bladder)
, TREMATODES - Flukes
Common name
-Flukes
Physiology
-flat, non-segmented, leaf-shaped body
-interior: oral cavity and digestive tract
-exterior:
>tegument: absorbs some nutrients, releases some waste
>acetabula (suckers): uses suckers to adhere to host
-Oral sucker
-Ventral sucker
-NO ANAL OPENING - they regurgitate waste
TREMATODES - Flukes
Types
-Common name
-Tissue and Intestinal Flukes
-Physiology
>resides within specific tissues/organs within human host
-Types
>reproduce asexually; hermaphroditic
-Life cycle of Trematodes (in general)
-Blood Flukes
>resides within the blood vessels in the abdominal wall of human
>reproduces SEXUALLY; male & female coexist in pairs during adult lifespan
>Schistosoma species
Life cycle of Trematodes (in general)
-Ovum: resistant; not generally transmissable form
-Larval forms
>Miracidia (ciliated): each species of fluke requires a specific fresh water snail as an
intermediate host
>Cercaria: may or may not be free swimming; can be infective stage to humans or it
can further develop into the metacercaria
>Metacercaria: non-motile; encysted form of cercariae; infective stage for humans
-Adult fluke: reproductive stage; causes pathogenesis (disease)
TREMATODES - Flukes tegument
What is the exterior of a trematode called?
TREMATODES - Flukes asexually
How do tissue and intestinal trematodes
reproduce?
TREMATODES - Flukes sexual reproduction
How do blood flukes reproduce?
TREMATODES - Flukes Miracidia
What is the first ciliated larval stage of a
trematode called?
TREMATODES - Flukes Metacercaria
What is the encysted, non-motile form of a
trematode called (also the infective stage)?
, TREMATODES - Flukes Liver Fluke/Sheep Liver Fluke
What is the common name for Fasciola
hepatica?
TREMATODES - Flukes Intestinal Fluke/Giant Intestinal Fluke
What is the common name for Fasciolpsis
buski?
TREMATODES - Flukes ingestion of metacercaria from undercooked water plant
What is the method of infection for Fasciola
hepatica?
TREMATODES - Flukes Snail (specific species)
What organism is required as an
intermediate host for trematodes?
TREMATODES - Flukes
General info for Fasciolopsis buski and Fasciola
hepatica
-Fasciolopsis buski: Intestinal or Giant Intestinal
Fluke *
>largest parasitic fluke to infect humans!
TREMATODES - Flukes
>Zoonosis: commonly infects pigs
>BIG: 8cm long x 3cm wide
-General info for Fasciolopsis buski and
-Fasciola hepatica: Sheep Liver Fluke or Liver
Fasciola hepatica
Fluke *
-Describe the ova morphology for
>Zoonosis: infects ruminants (sheep and cattle)
Fasciolopsis buski and Fasciola hepatica
-Life cycle of Fasciolopsis buski and
Describe the ova morphology for Fasciolopsis
Fasciola hepatica
buski and Fasciola hepatica
-F. buski and F. hepatica ova are very similar
-elllipsoidal; very large in size
-thin shell with operculum***
Life cy cle of Fasciolopsis buski and Fasciola
hepatica
-See CDC photo
TREMATODES - Flukes identify ova in stool
What is the method of diagnosis for
Fasciolopsis buski?
TREMATODES - Flukes metacercaria (on water plant)
What is the infective stage for Fasciolopsis
buski?
TREMATODES - Flukes
TREMATODES - Flukes
What 2 intermediate hosts does F. buski and F. hepatica require?
What 2 intermediate hosts does F. buski
and F. hepatica require? -specific species of snail (1st)
-fresh water plant (2nd)
Questions and CORRECT Answers
TREMATODES - Flukes
Common names for the following parasites:
TREMATODES - Flukes
Fasciolopsis buski - Intestinal or Giant Intestinal Fluke
Common names for the following parasites:
Fasciola hepatica - Sheep Liver Fluke or Liver Fluke
Fasciolopsis buski
Fasciola hepatica Clonorchis sinensis - Chinese Liver Fluke
Clonorchis sinensis
Paragonimus westermani Paragonimus westermani - Oriental Lung Fluke
Schistosoma mansoni
Schistosoma japoninum Schistosoma mansoni - Blood fluke (liver sinuses & intestinal tract)
Schistosoma haematobium
Schistosoma japoninum - Blood fluke (liver sinuses & intestinal tract)
Schistosoma haematobium - Blood fluke (bladder)
, TREMATODES - Flukes
Common name
-Flukes
Physiology
-flat, non-segmented, leaf-shaped body
-interior: oral cavity and digestive tract
-exterior:
>tegument: absorbs some nutrients, releases some waste
>acetabula (suckers): uses suckers to adhere to host
-Oral sucker
-Ventral sucker
-NO ANAL OPENING - they regurgitate waste
TREMATODES - Flukes
Types
-Common name
-Tissue and Intestinal Flukes
-Physiology
>resides within specific tissues/organs within human host
-Types
>reproduce asexually; hermaphroditic
-Life cycle of Trematodes (in general)
-Blood Flukes
>resides within the blood vessels in the abdominal wall of human
>reproduces SEXUALLY; male & female coexist in pairs during adult lifespan
>Schistosoma species
Life cycle of Trematodes (in general)
-Ovum: resistant; not generally transmissable form
-Larval forms
>Miracidia (ciliated): each species of fluke requires a specific fresh water snail as an
intermediate host
>Cercaria: may or may not be free swimming; can be infective stage to humans or it
can further develop into the metacercaria
>Metacercaria: non-motile; encysted form of cercariae; infective stage for humans
-Adult fluke: reproductive stage; causes pathogenesis (disease)
TREMATODES - Flukes tegument
What is the exterior of a trematode called?
TREMATODES - Flukes asexually
How do tissue and intestinal trematodes
reproduce?
TREMATODES - Flukes sexual reproduction
How do blood flukes reproduce?
TREMATODES - Flukes Miracidia
What is the first ciliated larval stage of a
trematode called?
TREMATODES - Flukes Metacercaria
What is the encysted, non-motile form of a
trematode called (also the infective stage)?
, TREMATODES - Flukes Liver Fluke/Sheep Liver Fluke
What is the common name for Fasciola
hepatica?
TREMATODES - Flukes Intestinal Fluke/Giant Intestinal Fluke
What is the common name for Fasciolpsis
buski?
TREMATODES - Flukes ingestion of metacercaria from undercooked water plant
What is the method of infection for Fasciola
hepatica?
TREMATODES - Flukes Snail (specific species)
What organism is required as an
intermediate host for trematodes?
TREMATODES - Flukes
General info for Fasciolopsis buski and Fasciola
hepatica
-Fasciolopsis buski: Intestinal or Giant Intestinal
Fluke *
>largest parasitic fluke to infect humans!
TREMATODES - Flukes
>Zoonosis: commonly infects pigs
>BIG: 8cm long x 3cm wide
-General info for Fasciolopsis buski and
-Fasciola hepatica: Sheep Liver Fluke or Liver
Fasciola hepatica
Fluke *
-Describe the ova morphology for
>Zoonosis: infects ruminants (sheep and cattle)
Fasciolopsis buski and Fasciola hepatica
-Life cycle of Fasciolopsis buski and
Describe the ova morphology for Fasciolopsis
Fasciola hepatica
buski and Fasciola hepatica
-F. buski and F. hepatica ova are very similar
-elllipsoidal; very large in size
-thin shell with operculum***
Life cy cle of Fasciolopsis buski and Fasciola
hepatica
-See CDC photo
TREMATODES - Flukes identify ova in stool
What is the method of diagnosis for
Fasciolopsis buski?
TREMATODES - Flukes metacercaria (on water plant)
What is the infective stage for Fasciolopsis
buski?
TREMATODES - Flukes
TREMATODES - Flukes
What 2 intermediate hosts does F. buski and F. hepatica require?
What 2 intermediate hosts does F. buski
and F. hepatica require? -specific species of snail (1st)
-fresh water plant (2nd)
