Hookworm Biology and Life Cycle Quiz
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Questions and Answers

What distinguishes the egg of hookworm when released by the worm in the intestine from when passed in feces?

  • It is larger in size in the intestine and smaller in size in feces
  • It contains a segmented ovum in the intestine and an unsegmented ovum in feces
  • It contains a colored shell in the intestine and a colorless shell in feces
  • It contains an unsegmented ovum in the intestine and a segmented ovum in feces (correct)

What is the infective stage of hookworm found in soil called?

  • Filariform larva (correct)
  • Rhabditiform larva
  • Filiform larva
  • Segmented larva

How does the rhabditiform larva of hookworm differ from Strongyloides stercoralis larva?

  • Rhabditiform larva is smaller than Strongyloides larva
  • Rhabditiform larva has a longer buccal cavity compared to Strongyloides larva
  • Rhabditiform larva has a small genital primordium compared to Strongyloides larva (correct)
  • Rhabditiform larva has more blastomeres compared to Strongyloides larva

What is the main symptom of chronic hookworm infections?

<p>Iron deficiency anemia with pallor and edema (A)</p> Signup and view all the answers

What is the blood loss per adult for Ancylostoma duodenale?

<p>0.05-0.3 ml (D)</p> Signup and view all the answers

What is the size range of hookworm eggs?

<p>56-75μm long by 36-40μm wide (B)</p> Signup and view all the answers

How long does it take for larvae to develop to infectivity within fertile eggs?

<p>Several weeks (C)</p> Signup and view all the answers

Where do the larvae mature further after penetrating the alveolar walls?

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

What is the term used for the infective stage of an embryonated egg with L3 larva?

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

How long does it take for adult worms to live?

<p>1 year (A)</p> Signup and view all the answers

What is the primary clinical manifestation of ascariasis?

<p>Abdominal pain (C)</p> Signup and view all the answers

What term is used for the stage when the egg hatches in the intestines and penetrates the mucosa?

<p>Rhabditiform larva (D)</p> Signup and view all the answers

What is the size range of the female Capillaria philippinensis worm?

<p>2.5-4.3 mm (A)</p> Signup and view all the answers

How are the eggs of Capillaria philippinensis different from those of Trichuris trichiura?

<p>Capillaria eggs have more prominent polar plugs (A)</p> Signup and view all the answers

What distinguishes a typical female Capillaria philippinensis from an atypical female?

<p>Number of eggs in the uterus and arrangement (D)</p> Signup and view all the answers

Which natural source serves as an intermediate host for Capillaria philippinensis?

<p>'Bagsit' fish (Hypseleoptris bipartita) (D)</p> Signup and view all the answers

What feature distinguishes the male Capillaria philippinensis worm?

<p>Long non-spiny sheath (B)</p> Signup and view all the answers

Which term describes the production of larvae by the first generation female Capillaria philippinensis worms?

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

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