Question
Stool examination in a patient reveals the following finding. What is the likely route of infection of this parasite?
A. Ingestion of food contaminated with the egg of larva
B. Insect bite
C. Improperly cooked beef
D. Swimming in dirty water pool
Show Answer
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Correct Answer » A
Explanation
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Ans: A. Ingestion of food contaminated with the egg of larva
Elongated, barrel-shaped eggs with a polar ‘plug’ at each end shown here are characteristic of Trichuris egg, which causes trichuriasis via frco-oral transmission.
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Nematodes
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Fecal examination
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Trichinella spiralis
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Adult worm°
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Trichuris trichiura
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Eggs (barrel shaped)°
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Strongyloides
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Rhabditiform larvae°
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Ancylostoma duodenale & Necator americanus
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Egg which may be hatched, so rhabditiform larvae can be seen
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Enterobius vermicularis
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Usually not useful
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Ascaris lumbricoides
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Eggs & adult worm°
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Filariasis
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No role
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Dracunculus medinensis
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No role
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