Question:
Visceral larva migrans is seen in:
Visceral larva migrans is seen in:
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The dog roundworm in which humans are accidental hosts.
Updated On: Jun 24, 2026
- Strongyloides stercoralis
- Ankylostoma duodenale
- Toxocara canis
- Ascaris lumbricoides
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The Correct Option is C
Solution and Explanation
Step 1: Visceral larva migrans (VLM) is caused by the migration of larvae of animal nematodes through human viscera, where humans are accidental dead-end hosts.
Step 2: The classic agent is Toxocara canis (the dog roundworm); ingested eggs hatch and larvae migrate through liver, lungs, eyes and other organs causing VLM and ocular larva migrans.
Step 3: Strongyloides stercoralis and Ankylostoma duodenale cause cutaneous larva migrans-type skin penetration and intestinal infection in humans, not classic VLM.
Step 4: Ascaris lumbricoides is a human roundworm with a normal lung migration phase but is not the cause of visceral larva migrans.
Conclusion: The correct answer is option 3, Toxocara canis, matching the printed key.
Step 2: The classic agent is Toxocara canis (the dog roundworm); ingested eggs hatch and larvae migrate through liver, lungs, eyes and other organs causing VLM and ocular larva migrans.
Step 3: Strongyloides stercoralis and Ankylostoma duodenale cause cutaneous larva migrans-type skin penetration and intestinal infection in humans, not classic VLM.
Step 4: Ascaris lumbricoides is a human roundworm with a normal lung migration phase but is not the cause of visceral larva migrans.
Conclusion: The correct answer is option 3, Toxocara canis, matching the printed key.
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