Toxocara canis (Visceral larva migrans)

Summary of Toxocara canis (Visceral larva migrans)
Toxocara canis is a parasitic helminth that infects humans through egg ingestion from dog fur, soil, or undercooked lamb or rabbit. Adult worms measure from 9 to 18 cm and are yellow-white in color. They can cause the disease visceral larva migrans in humans, in which the larvae migrate to and infect the heart, liver, and central nervous system. Treatment is with the benzimidazoles; albendazole or mebendazole.

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Toxocara canis (Visceral larva migrans)

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Toxocara canis (Visceral larva migrans)

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Toxocara canis causes in the central nervous system.

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A previously healthy 6-year-old boy is brought in to the emergency department due to intermittent fever, abdominal pain and wheezing for the past 2 days. The patient has no past medical history of lung infection, asthma, recent travel or any sick contacts. The patient is in moderate distress but alert and keeps repeating that he misses his puppy. The mother mentions that the patient recently got a puppy for his birthday that he's been taking care of. She further states that he's been cleaning up after the puppy when he goes outside in the dirt and has gotten in trouble multiple times for not washing up afterward. Physical examination shows hepatomegaly and multiple skin lesions, and initial labs show eosinophilia and anemia. Which of the following tests is most likely used to confirm the diagnosis?

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