**Question:** Visceral larva migrans caused by:

A. Taenia solium
B. Taenia saginata
C. Ascaris lumbricoides
D. Ancylostoma duodenale

**Core Concept:**
Visceral larva migrans (VLM) is a clinical syndrome caused by the migration of larval forms of certain parasitic worms, particularly those belonging to the family Toxocaridae and Ascaridae. These larvae can invade various organs, leading to tissue damage and inflammation.

**Why the Correct Answer is Right:**
The correct answer, D - Ancylostoma duodenale, belongs to the family Ascaridae, which includes roundworms that can cause VLM. Ancylostoma duodenale is a common intestinal parasite that can lead to larval migration to other organs, causing symptoms of VLM.

**Why Each Wrong Option is Incorrect:**
A - Taenia solium (Papillon-Fleury syndrome) and B - Taenia saginata (Behçet syndrome) are not the correct answers because they belong to the family Taenidae, which primarily affects the brain (encephalitozoonosis) and cause cysticercosis, not VLM.

C - Ascaris lumbricoides is a different parasitic worm causing ascariasis, not VLM. The correct answer belongs to a different family and has different clinical manifestations.

**Clinical Pearl:**
Visceral larva migrans primarily affects individuals residing in areas with high endemicity of soil-transmitted helminths like Ancylostoma duodenale. Atypical cases can occur in travelers returning from endemic areas and present with systemic symptoms. Understanding the correct answer helps differentiate it from other similar syndromes, such as neurocysticercosis and echinococcosis.