Trematodes MCQ Questions With Answers
Attempt this 'Trematodes MCQ Questions With Answers' quiz and review your knowledge about the trematodes class. In the study of animals, the Trematoda is a class within the phylum Platyhelminthes. It includes two groups of parasitic flatworms, known as flukes. Do you know about these organisms? Let's see it in the below quiz. The question gets difficult when you move ahead in the quiz. Shall we begin it now? All the very best, dear!
- 1.
The common liver fluke, _____________, inflicts tissue damage that sometimes predisposes cattle to redwater disease caused by the bacterium Clostridium hemolyticum.
- A.
Dicrocoelium dendriticum
- B.
Fasciola hepatica
- C.
Paramphistomum cervi
- D.
Nanophyetus salmincola
- E.
Paragonimus kellicotti
Correct Answer
B. Fasciola hepaticaExplanation
Fasciola hepatica is the correct answer because it is a common liver fluke that can cause tissue damage in cattle. This tissue damage can make the cattle more susceptible to redwater disease, which is caused by the bacterium Clostridium hemolyticum.Rate this question:
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- 2.
The term "monogenetic" is used to _________ and specifically refers to _____________.
- A.
Describe how parasites reproduce/ the presence of both types of sex organs in the same individual
- B.
Designate an Order of flukes/ the presence of both types of sex organs in the same individual
- C.
Describe how parasites reproduce/ flukes with separate sexes (schistosomes)
- D.
Describe how parasites reproduce/ flukes that only reproduce sexually
- E.
Designate an Order of tapeworms/ tapeworms that are hermaphroditic
Correct Answer
C. Describe how parasites reproduce/ flukes with separate sexes (schistosomes)Explanation
The term "monogenetic" is used to describe how parasites reproduce. It specifically refers to flukes with a direct life cycle and only one host.Rate this question:
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- 3.
A term that refers to non-hermaphroditic helminths is _____________.
- A.
Monoecious
- B.
Monogenetic
- C.
Heterooxenous
- D.
Digenetic
- E.
Dioecious
Correct Answer
B. MonogeneticExplanation
The term "monogenetic" refers to organisms that have a simple life cycle with only one host. In the context of helminths, monogenetic refers to parasites that have a direct life cycle and do not require intermediate hosts. This term is used specifically for helminths that are not hermaphroditic, meaning they have separate male and female individuals. Therefore, "monogenetic" is the correct answer to the question.Rate this question:
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- 4.
The helminths included in the Phylum Platyhelminths are __________, ___________, and ______________.
- A.
Flukes/ leeches/ tapeworms
- B.
Leeches/ slugs/tapeworms
- C.
Slugs/ tapeworms/ flukes
- D.
Planaria/ slugs/ leeches
- E.
Flukes/ planaria/ tapeworms
Correct Answer
E. Flukes/ planaria/ tapewormsExplanation
The correct answer is flukes/ planaria/ tapeworms. This is because flukes, planaria, and tapeworms are all examples of helminths that belong to the Phylum Platyhelminths.Rate this question:
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- 5.
A ______________ is the larval stage of a fluke that is covered with cilia and swims about seeking out a snail to serve as an intermediate host.
- A.
Coracidium
- B.
Miracidium
- C.
Cercaria
- D.
Metacercaria
- E.
Redia
Correct Answer
B. MiracidiumExplanation
A miracidium is the correct answer because it is the larval stage of a fluke that is covered with cilia and swims about seeking out a snail to serve as an intermediate host.Rate this question:
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- 6.
Two ways flukes harm their victims (definitive hosts) are by _______ and ________.
- A.
Damaging tissues during migration/ blocking biliary ducts
- B.
Stimulating granuloma formation around trapped eggs/ transmitting rickettsial agents
- C.
Predisposing to diseases caused by Clostridium spp/ causing cirrhosis of the liver
- D.
A, b and c are all correct
- E.
A and c are correct
Correct Answer
A. Damaging tissues during migration/ blocking biliary ductsExplanation
Two ways flukes harm their victims (definitive hosts) are by damaging tissues during migration and blocking biliary ducts.Rate this question:
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- 7.
The life cycle stage of the digenetic trematodes that cause "swimmer's itch" is a ___________.
- A.
Metacercaria
- B.
Miracidium
- C.
Redia
- D.
Deplostomule
- E.
Cercaria
Correct Answer
E. CercariaExplanation
The correct answer is cercaria. Digenetic trematodes that cause "swimmer's itch" go through a complex life cycle. The redia stage is an intermediate stage in this life cycle. Redia are larval forms that develop from miracidia, which are released from eggs by the adult trematodes. Redia then produces cercariae, which is the infective stage for humans. The cercariae penetrate the skin of humans while swimming in contaminated water, causing the itchy rash known as "swimmer's itch." Therefore, the cercaria stage is the life cycle stage of the digenetic trematodes that cause "swimmer's itch."Rate this question:
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- 8.
The fluke, _______________, is most often encounter by veterinarians in ___________ and ___________.
- A.
Fasciola hepatica/ sheep/ frogs
- B.
Prosthogonimus macrorchus/ sheep/ cattle
- C.
Paragonimus kellicotti/ dogs/ cats
- D.
Alaria marcianae/ sheep/ cattle
- E.
Nanophyetes salmincola/ fish/ frogs
Correct Answer
C. Paragonimus kellicotti/ dogs/ catsExplanation
Paragonimus kellicotti is a fluke that is commonly encountered by veterinarians in dogs and cats.Rate this question:
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- 9.
The metacercariae of Dicrocoelium dendriticum are always found in ____________.
- A.
The second intermediate host
- B.
The definitive host
- C.
A terrestrial snail
- D.
A paratenic host
- E.
The mollusk intermediate host
Correct Answer
A. The second intermediate hostExplanation
The correct answer is the second intermediate host. Dicrocoelium dendriticum is a parasitic liver fluke that has a complex life cycle involving multiple hosts. The first intermediate host is a terrestrial snail, where the fluke larvae develop into cercariae. These cercariae are then ingested by ants, which act as the second intermediate host. Inside the ant, the cercariae encyst and form metacercariae. The metacercariae are then ingested by the definitive host, typically a herbivorous mammal, where they develop into adult flukes in the liver. Therefore, the metacercariae of Dicrocoelium dendriticum are always found in the second intermediate host, which in this case is an ant.Rate this question:
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- 10.
The second intermediate host of Paragonimus kellicotti, a lung fluke in dogs, is a __________.
- A.
Crawfish
- B.
Frogs
- C.
Beetles
- D.
Lizard
- E.
Both A & B
Correct Answer
A. CrawfishExplanation
Paragonimus kellicotti, the lung fluke that infects dogs, cats, and raccoons, has a complex life cycle involving two intermediate hosts. The first intermediate host is a snail, and the second intermediate host is typically a crustacean or freshwater crab, often specifically a crayfish. Therefore, option A, crayfish, is the correct answer.Rate this question:
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- 11.
The animals that serve as the first (or only) intermediate hosts for digenetic flukes are ____________.
- A.
Crustaceans
- B.
Fishes
- C.
Mollusks
- D.
Amphibians
- E.
Arthropods
Correct Answer
C. MollusksExplanation
Mollusks serve as the first (or only) intermediate hosts for digenetic flukes. Digenetic flukes are parasitic flatworms that have complex life cycles involving multiple hosts. Mollusks, such as snails, are typically the first intermediate hosts where the fluke undergoes asexual reproduction. The fluke then moves on to infect the definitive host, which is usually a vertebrate, such as a mammal or bird. Therefore, mollusks play a crucial role in the life cycle of digenetic flukes as the initial hosts.Rate this question:
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- 12.
The digenetic fluke that transmits Neorickettsia helminthoeca to dogs is ___________.
- A.
Schistosoma mansoni
- B.
Dicrocoelium dendriticum
- C.
Echinostoma revolution
- D.
Nanophyetus salmincola
- E.
Paragonimus kellicotti
Correct Answer
D. Nanophyetus salmincolaExplanation
Nanophyetus salmincola is a digenetic fluke that is known to transmit Neorickettsia helminthoeca to dogs. This parasite is commonly found in the Pacific Northwest region of the United States and is primarily associated with salmonid fish as its intermediate host. Dogs become infected with Neorickettsia helminthoeca by ingesting raw or undercooked fish infected with Nanophyetus salmincola. Once infected, dogs can develop a condition called salmon poisoning disease, which can be fatal if left untreated. Therefore, Nanophyetus salmincola is the correct answer for the given question.Rate this question:
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- 13.
The helminths referred to as __________ and ___________ belong to the Phylum Platyhelminthes.
- A.
Tapeworms/ flukes
- B.
Trematodes/ cestodes
- C.
Tapeworms/ planarians
- D.
A and b are correct
- E.
A, b and c are all correct
Correct Answer
E. A, b and c are all correctExplanation
The helminths referred to as tapeworms and flukes belong to the Phylum Platyhelminthes. Trematodes and cestodes are the scientific names for flukes and tapeworms, respectively. Planarians are also a type of flatworm belonging to the same phylum. Therefore, all options a, b, and c are correct.Rate this question:
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- 14.
Which of the following animals is the second intermediate host for Paragonimus kellicotti, the lung fluke of dogs, cats and raccoons?
- A.
Crayfish
- B.
Frogs
- C.
Salmonid fish
- D.
Lizards
- E.
Oligochaetes
Correct Answer
A. CrayfishExplanation
Crayfish is the second intermediate host for Paragonimus kellicotti, the lung fluke of dogs, cats, and raccoons. Intermediate hosts are organisms that harbor the parasite during one stage of its life cycle, allowing it to develop and reproduce. In the case of Paragonimus kellicotti, the first intermediate host is a snail, where the parasite undergoes initial development. The parasite then infects the crayfish, where it continues to develop before being transmitted to the final host, which in this case are dogs, cats, and raccoons. Therefore, crayfish serves as a crucial link in the life cycle of Paragonimus kellicotti.Rate this question:
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- 15.
Which for the following animals is not known to become infected with Fasciola hepatica?
- A.
Rabbits
- B.
Fish
- C.
human beings
- D.
Deer
- E.
Horses
Correct Answer
B. FishExplanation
Fish are not known to become infected with Fasciola hepatica. This parasitic worm primarily infects the liver of mammals, including rabbits, human beings, deer, and horses. Fish do not have a liver structure that is susceptible to this particular parasite. Therefore, fish are not at risk of becoming infected with Fasciola hepatica.Rate this question:
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- 16.
___________ is a fluke that is known to predispose cattle to "redwater' disease caused by Clostridium hemolyticum.
- A.
Dicrocoelium dendriticum
- B.
Fasciola hepatica
- C.
Nanophyetus salmincola
- D.
Paragonimus kellicotti
- E.
Paramphistomum cervi
Correct Answer
B. Fasciola hepaticaExplanation
Fasciola hepatica is a fluke that is known to predispose cattle to "redwater" disease caused by Clostridium hemolyticum.Rate this question:
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Feb 15, 2024Quiz Edited by
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Mar 25, 2010Quiz Created by
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