Fungal infection: practice question

A Dermatology 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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Dermatology · Fungal infection

Sample item

What bedside test supports diagnosis of a superficial dermatophyte infection?

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

The answer and the reasoning

C. KOH preparation

Potassium hydroxide dissolves keratin in a skin scraping and can reveal fungal hyphae, supporting a superficial dermatophyte diagnosis.

Option by option

  • A. Peak-flow test

    Peak flow measures expiratory airflow.

  • B. Urine dipstick

    Urine dipstick assesses urinary constituents.

  • C. KOH preparation (correct)

    Correct: KOH microscopy can show fungal hyphae.

  • D. Electrocardiogram

    ECG records cardiac electrical activity.

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.

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Questions about this Dermatology question

What is the answer to this Dermatology question?

The best answer is C, KOH preparation. Potassium hydroxide dissolves keratin in a skin scraping and can reveal fungal hyphae, supporting a superficial dermatophyte diagnosis.

Why is "Peak-flow test" not the answer?

Peak flow measures expiratory airflow.

Why is "Urine dipstick" not the answer?

Urine dipstick assesses urinary constituents.

Why is "Electrocardiogram" not the answer?

ECG records cardiac electrical activity.

What concept does this question test?

It tests Fungal infection in Dermatology. The correct option holds because: Correct: KOH microscopy can show fungal hyphae.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. 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 Fungal infection?

Learn each condition by its primary lesion, site and signature sign. Then use the flashcards and the other Dermatology 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.