trematodes
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Questions and Answers

What is the shape of the adult Fasciolopsis buski?

  • Equipped with so-called shoulders (correct)
  • Somewhat oblong
  • Oval
  • Pyriform

    • What feature is characteristic of the adult Fasciolopsis buski?

  • Fleshy adult
  • Protected by an outer layer of fine spines
  • Tiny layer of scaly spines covers the organism
  • Equipped with so-called shoulders (correct)

    • What is the shape of the egg of Fasciola hepatica?

  • Oval
  • Somewhat oblong (correct)
  • Pyriform
  • Roundish

    • What is the size of the adult Fasciola hepatica?

    <p>5 by 1.5 cm</p> Signup and view all the answers

    What is the shape of the Fasciolopsis buski eggs?

    <p>Somewhat oblong</p> Signup and view all the answers

    What is the size range of Fasciolopsis buski eggs?

    <p>128-140 um by 78-85 um</p> Signup and view all the answers

    What is present in the eggs of Fasciolopsis buski?

    <p>Undeveloped miracidium</p> Signup and view all the answers

    What is a characteristic feature of Fasciolopsis buski eggs?

    <p>Presence of operculum</p> Signup and view all the answers

    What is the drug of choice for treating Fasciolopsis buski infections?

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

    What is the mode of transmission for Fasciolopsis buski?

    <p>Ingestion of water plants with metacercariae</p> Signup and view all the answers

    What is the diagnostic stage of Fasciolopsis buski?

    <p>Unembryonated eggs passed in feces</p> Signup and view all the answers

    What is the intermediate host of Fasciolopsis buski?

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

    What is the definitive host of Fasciolopsis buski?

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

    What is the treatment for Fasciolopsis buski infection?

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

    What is a common symptom of Fasciolopsis buski infection?

    <p>All of the above</p> Signup and view all the answers

    Study Notes

    Characteristics of Trematodes

    • Fasciola hepatica: 128-150 um by 60-90 um, somewhat oblong, with an undeveloped miracidium present
    • Clonorchis sinensis: 78-120 µm long, 45-60 µm wide, somewhat oval, with a prominent operculum
    • Schistosoma mansoni: 112-182 µm by 40-75 µm, oblong, with a developed miracidium large and lateral
    • Fasciolopsis buski: 5 by 1.5 cm, somewhat oblong, fleshy adult, with an undeveloped miracidium present
    • Heterophyes heterophyes: 1.5 by 0.5 mm, pyriform, with a tiny layer of scaly spines covering the organism
    • Metagonimus yokogawai: 1 by 0.5 mm, pyriform, with tapering at the anterior end and rounding at the posterior end
    • Paragonimus westermani: 1 by 0.7 cm, somewhat oval, with a prominent operculum

    Life Cycle

    • Infective stage: Free-swimming cercariae released from snail into water
    • Definitive stage: Eggs shed from infected human
    • Intermediate host: Freshwater snails
    • Definitive host: Humans

    Egg/Ova Characteristics

    • Fasciolopsis buski: 128-140 um by 78-85 um, somewhat oblong, with an undeveloped miracidium present
    • Fasciola hepatica: Undeveloped miracidium present, with distinct shoulders and a small knob opposite operculum

    Symptoms and Complications

    • Fasciolopsiasis: Abdominal discomfort, inflammation, and bleeding in the affected area, jaundice, diarrhea, gastric discomfort, edema, malabsorption syndrome, and intestinal obstruction
    • Fascioliasis: Headache, fever, and chills, pain in the liver area, eosinophilia, jaundice, liver tenderness, anemia, diarrhea, and digestive discomfort
    • Clonorchiasis: Fever, abdominal pain, eosinophilia, diarrhea, anorexia, epigastric discomfort, and occasional jaundice
    • Heterophyiasis: Fever, abdominal pain, eosinophilia, diarrhea, anorexia, epigastric discomfort, and occasional jaundice
    • Paragonimiasis: Cough, bloody diarrhea, eosinophilia, painful urination, and hematuria
    • Complications: Nephrotic syndrome, bladder cancer, increased risk of Salmonella infections, and central nervous system involvement

    Treatment

    • Praziquantel: Effective against all trematodes
    • Surgery: Necessary for patients in whom obstruction has occurred

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    Description

    Test your knowledge on the life cycle and characteristics of Fasciolopsis buski, a parasitic flatworm. Learn about the different stages of its life cycle, including cercariae and egg characteristics. Understand the hosts and vectors involved in its transmission.

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