29 Questions
What type of host do all parasitic trematodes require?
Freshwater snails
What is the characteristic shape of trematodes?
Flat and leaf-like
What is the larval stage of a fluke that swims about seeking out a snail to serve as an intermediate host?
Miracidium
What species of snail serves as the intermediate host for Schistosoma mansoni?
Biomphalaria
What is the exception to the rule that all Trematoda are hermaphrodite?
Schistosoma spp.
What is the habitat of Fasciolopsis buski?
Small intestine
What is the intermediate host of Fasciolopsis buski?
Freshwater snails
What is the diagnostic stage of Fasciolopsis buski?
Egg in stool
What is the route of infection of Fasciolopsis buski?
By ingesting metacercariae on aquatic plants
What is the infective stage of Fasciolopsis buski?
Metacercariae
What is the characteristic of the sexes of Fasciolopsis buski?
Hermaphrodite (monoecious), the sexes not separated
What is a characteristic that distinguishes Schistosoma spp from other trematodes?
The sexes are separate into male and female
What is true about the life cycle of trematodes?
They require a snail to serve as an intermediate host
What is a common characteristic of trematodes?
They are leaf-like worms
What is a characteristic of Fasciolopsis buski?
It is also known as the giant intestinal fluke
What is true about the infective stage of Schistosoma spp?
It is the cercariae stage
What is a difference between Schistosoma spp and other trematodes?
Schistosoma spp are diecious, while other trematodes are monoecious
Which of the following symptoms is NOT a result of the host's inflammatory response to Schistosoma japonicum eggs?
Gastrointestinal tract (GIT) inflammation
Which stage of the Schistosoma japonicum life cycle is responsible for direct skin penetration and infection?
Cercariae
What is the shape of the egg of Schistosoma japonicum?
Oval with a lateral spine
Which of the following is NOT a habitat of Schistosoma japonicum?
Veins surrounding the large intestine
What is the treatment for intestinal Schistosomiasis caused by Schistosoma japonicum?
Praziquantel
Which species of Schistosoma causes urinary Schistosomiasis?
Schistosoma haematobium
Where do fertilized eggs penetrate to enter the intestine or bladder?
Vascular walls
What is the final, free-swimming larval stage of the parasite?
Cercaria
Where does the mating of male and female schistosomes take place?
Intestine
What is one way to control and prevent schistosomiasis?
Eradicating mollusks
Which of the following is NOT a way to control and prevent schistosomiasis?
Eating contaminated food
What happens to the cercaria in the freshwater environment?
They are released into the fresh water
Learn about the general characteristics of trematodes, including their physical appearance, habitats, and life cycle stages. Discover how they infest human organs and their relation to freshwater snails. Understand the role of miracidium in their life cycle.
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