Hookworm Biology and Life Cycle Quiz

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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?

Iron deficiency anemia with pallor and edema (A) Signup and view all the answers

What is the blood loss per adult for Ancylostoma duodenale?

0.05-0.3 ml (D) Signup and view all the answers

What is the size range of hookworm eggs?

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

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

Several weeks (C) Signup and view all the answers

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

Lungs (B) Signup and view all the answers

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

Strongyloides larva (A) Signup and view all the answers

How long does it take for adult worms to live?

1 year (A) Signup and view all the answers

What is the primary clinical manifestation of ascariasis?

Abdominal pain (C) Signup and view all the answers

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

Rhabditiform larva (D) Signup and view all the answers

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

2.5-4.3 mm (A) Signup and view all the answers

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

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

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

Number of eggs in the uterus and arrangement (D) Signup and view all the answers

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

'Bagsit' fish (Hypseleoptris bipartita) (D) Signup and view all the answers

What feature distinguishes the male Capillaria philippinensis worm?

Long non-spiny sheath (B) Signup and view all the answers

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

Larviparous (D) Signup and view all the answers