Parasite Life Cycles in Different Hosts
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Questions and Answers

Which type of life cycle requires parasites to need only one host (man)?

  • Indirect/complex life cycle
  • Double-host life cycle
  • Single-host life cycle
  • Direct/simple life cycle (correct)
  • How can trematode eggs cause mechanical trauma in humans?

  • By causing mucosal irritation (correct)
  • By depositing in the lungs
  • By migrating to the liver
  • By adhering to the intestinal wall
  • Which parasite may compress surrounding tissues due to characteristic cystic lesions it produces?

  • Paragonimus
  • Schistosoma mansoni
  • Hydatid cysts (correct)
  • Fasciola hepatica
  • Which type of life cycle needs one definitive host and two intermediate hosts?

    <p>Triple-host life cycle</p> Signup and view all the answers

    What can result from the migration of helminthic larvae in the lungs?

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

    How is infection commonly transmitted orally?

    <p>By ingestion of contaminated food or water</p> Signup and view all the answers

    Which parasite is most frequently transmitted through sexual contact?

    <p>Trichomonas vaginalis</p> Signup and view all the answers

    Which parasite can penetrate through the skin of an individual walking barefooted over fecally contaminated soil?

    <p>Strongyloides stercoralis</p> Signup and view all the answers

    Which type of parasite is transmitted by the bite of a female anopheles mosquito?

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

    Which parasite is commonly transmitted through mother to fetus transmission?

    <p>Toxoplasma gondii</p> Signup and view all the answers

    Which parasite is transmitted by the bite of a tsetse fly?

    <p>Trypanosoma cruzi</p> Signup and view all the answers

    What is the main pathological effect of E.histolytica on the large intestine?

    <p>Granuloma formation</p> Signup and view all the answers

    Which parasite causes chronic inflammation of the lymphatics and lymph vessels?

    <p>W.bancrofti</p> Signup and view all the answers

    What type of changes can Trematode eggs induce in the body?

    <p>Granuloma formation</p> Signup and view all the answers

    Which group of parasites produce enzymes that cause digestion and necrosis of host cells?

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

    What is one example of a parasitic toxin responsible for pathogenesis of the disease?

    <p>Cercarial dermatitis</p> Signup and view all the answers

    What kind of manifestations can parasites' metabolic products produce in sensitized hosts?

    <p>Anaphylactic reactions</p> Signup and view all the answers

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