General and Parasitic Characteristics of Nematodes
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Questions and Answers

What is the approximate length of adult female Ascaris lumbricoides?

  • 20 to 35 cm (correct)
  • 5 to 10 cm
  • 40 to 50 cm
  • 12 to 25 cm

    • How does ascariasis primarily infect humans?

  • Through mosquito bites
  • Through sexual contact
  • Through contaminated food, water, or raw vegetables (correct)
  • Through airborne transmission

    • How many eggs per day can a female Ascaris lumbricoides produce?

  • 200,000 eggs (correct)
  • 500,000 eggs
  • 100,000 eggs
  • 50,000 eggs

    • Which type of soil conditions are optimal for the embryonation of Ascaris lumbricoides eggs?

    <p>Moist and warm soil</p> Signup and view all the answers

    What is the correct order of the life cycle stages of Ascaris lumbricoides?

    <p>Egg, larvae, adult</p> Signup and view all the answers

    What is the common name for Ascaris lumbricoides?

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

    Where do adult hookworms reside in the human body?

    <p>Small intestine</p> Signup and view all the answers

    What is the infective stage of hookworm larvae called?

    <p>Filariform larvae</p> Signup and view all the answers

    How long can infective hookworm larvae survive in favorable environmental conditions?

    <p>4 weeks</p> Signup and view all the answers

    Which antiparasitic medication is NOT mentioned as a treatment for hookworm infection?

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

    How do hookworm larvae enter the human body during infection?

    <p>Penetration through the skin</p> Signup and view all the answers

    Which characteristic distinguishes Ancylostoma duodenale from Necator americanus in adult females?

    <p>$10 - 13$ mm vs. $9 - 11$ mm length</p> Signup and view all the answers

    What is the treatment duration for hookworm infections with albendazole?

    <p>1-3 days</p> Signup and view all the answers

    How does Strongyloides stercoralis infection typically begin?

    <p>Through skin penetration by filariform larvae</p> Signup and view all the answers

    What is characteristic of Strongyloides stercoralis life cycle compared to most nematodes?

    <p>It alternates between free-living and parasitic cycles</p> Signup and view all the answers

    How do rhabditiform larvae passed in the stool develop into infective filariform larvae?

    <p>By molting twice</p> Signup and view all the answers

    What distinguishes the Strongyloides stercoralis life cycle in terms of larval development?

    <p>Larvae undergo four molts before maturing into adults</p> Signup and view all the answers

    In what way do infective filariform larvae initiate the parasitic cycle in the human host?

    <p>By penetrating the skin</p> Signup and view all the answers

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