Uvea: ocular toxocariasis: practice question

A Ophthalmology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Ophthalmology · Uvea: ocular toxocariasis

Sample item

A 7-year-old with a pet puppy has a unilateral white peripheral retinal granuloma with vitreous bands. Ultrasound shows no intralesional calcification. Which test best supports the diagnosis?

ASabin-Feldman dye testBELISA for antibodies to ToxocaraCMantoux testDVDRL test

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. ELISA for antibodies to Toxocara

Ocular toxocariasis from Toxocara canis larvae causes a peripheral granuloma with traction bands in a child with exposure to puppies. The absence of calcification helps to separate it from retinoblastoma, and antibodies are measured by ELISA, ideally in vitreous or aqueous.

Option by option

A. Sabin-Feldman dye test
The Sabin-Feldman dye test detects antibodies to Toxoplasma, which presents differently.
B. ELISA for antibodies to Toxocara (correct)
Correct. ELISA for Toxocara antibodies supports ocular toxocariasis in a child with this lesion.
C. Mantoux test
A Mantoux test supports tuberculosis, which is not the diagnosis here.
D. VDRL test
VDRL is a screening test for syphilis and does not identify a parasitic granuloma.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Ophthalmology question

What is the answer to this Ophthalmology question?

The best answer is B, ELISA for antibodies to Toxocara. Ocular toxocariasis from Toxocara canis larvae causes a peripheral granuloma with traction bands in a child with exposure to puppies.

Why is "Sabin-Feldman dye test" not the answer?

The Sabin-Feldman dye test detects antibodies to Toxoplasma, which presents differently.

Why is "Mantoux test" not the answer?

A Mantoux test supports tuberculosis, which is not the diagnosis here.

Why is "VDRL test" not the answer?

VDRL is a screening test for syphilis and does not identify a parasitic granuloma.

What concept does this question test?

It tests Uvea: ocular toxocariasis in Ophthalmology. The absence of calcification helps to separate it from retinoblastoma, and antibodies are measured by ELISA, ideally in vitreous or aqueous.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Uvea: ocular toxocariasis?

Group the red eye by what to examine and what the pupil does. Then use the flashcards and the other Ophthalmology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.