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 (A)</p> Signup and view all the answers

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

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

What is the common name for Ascaris lumbricoides?

<p>Roundworm (B)</p> Signup and view all the answers

Where do adult hookworms reside in the human body?

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

What is the infective stage of hookworm larvae called?

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

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

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

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

<p>Chloroquine (B)</p> Signup and view all the answers

How do hookworm larvae enter the human body during infection?

<p>Penetration through the skin (B)</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 (C)</p> Signup and view all the answers

What is the treatment duration for hookworm infections with albendazole?

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

How does Strongyloides stercoralis infection typically begin?

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

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

<p>By molting twice (C)</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 (D)</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 (D)</p> Signup and view all the answers

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