Exploring the Life Cycle of Trematodes
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Questions and Answers

Which of the following is NOT a family of flukes mentioned in the text?

  • Gorgoderoidea (correct)
  • Heterophyids
  • Opistorchiidae
  • Paragonimidae
  • Which fluke inhabits the pancreas?

  • Heterophyes heterophyes
  • Opistorchis viverrini
  • Metagonimus yokogawai
  • Eurytrema pancreaticum (correct)
  • Which fluke is the only clinically relevant species in the Philippines?

  • Fasciola hepatica
  • Paragonimus westermani (correct)
  • Opistorchis felineus
  • Clonorchis sinensis
  • Which of the following is a characteristic of all flukes mentioned in the text?

    <p>They require two intermediate hosts</p> Signup and view all the answers

    Which stage of the trematode is infective to the 1st intermediate host?

    <p>Miracidium</p> Signup and view all the answers

    What happens to the miracidium if it cannot find a host within 8-12 hours?

    <p>It dies</p> Signup and view all the answers

    Which stage of the trematode is responsible for asexual reproduction to form more sporocysts or move to the next stage redia?

    <p>Sporocyst</p> Signup and view all the answers

    Which type of cercaria has a big, round to oval head and no stylet in the oral sucker?

    <p>Gymnocephalus</p> Signup and view all the answers

    Which structure is commonly mistaken as the intestine in a trematode?

    <p>Uterus</p> Signup and view all the answers

    What is the function of the vitellaria in a trematode?

    <p>Produce shell material for the eggs</p> Signup and view all the answers

    Which drug is the recommended treatment for all trematode infections?

    <p>Praziquantel</p> Signup and view all the answers

    Which developmental stage of a trematode is released in water from the egg or inside the first intermediate host?

    <p>Miracidium</p> Signup and view all the answers

    Which class do Trematodes belong to?

    <p>Class Trematoda</p> Signup and view all the answers

    What are the two orders of Trematodes mentioned in the text?

    <p>Order Diplostomida and Order Plagiorchiida</p> Signup and view all the answers

    Which family is known as the Blood Flukes?

    <p>Family Schistosomatidae</p> Signup and view all the answers

    Which family is known as the Intestinal Fluke?

    <p>Family Echinostomatidae</p> Signup and view all the answers

    Which stage does the Redia mature into in most trematodes?

    <p>Cercaria</p> Signup and view all the answers

    Which stage does the Cercaria encyst to become in the tissue of the 2nd intermediate host?

    <p>Metacercaria</p> Signup and view all the answers

    What is the infective stage of blood flukes called?

    <p>Cercaria</p> Signup and view all the answers

    What is the final destination of the adult worms in blood flukes?

    <p>Liver</p> Signup and view all the answers

    Which type of cercaria has fins all over its body?

    <p>Pleurolophocercous</p> Signup and view all the answers

    Which type of cercaria has a big round head?

    <p>Gymnocephalus</p> Signup and view all the answers

    Which larval stage of the trematode sheds its tail after penetrating the skin of a human?

    <p>Schistosomule</p> Signup and view all the answers

    Which stage of the schistosomule's life cycle occurs after it penetrates the human skin?

    <p>Heart-lung migration</p> Signup and view all the answers

    How does a human get infected with schistosomiasis?

    <p>By coming into contact with contaminated water</p> Signup and view all the answers

    Where does the schistosomule go after it reaches the human circulation?

    <p>Liver</p> Signup and view all the answers

    What happens to the schistosomule after it becomes an adult worm?

    <p>It lays eggs</p> Signup and view all the answers

    Where does the adult worm of schistosomiasis reside in the human body?

    <p>Blood vessels</p> Signup and view all the answers

    In which region is schistosomiasis most commonly endemic in the Philippines?

    <p>Visayas</p> Signup and view all the answers

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