Laboratory diagnosis: practice question

A Microbiology 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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Microbiology · Laboratory diagnosis

Sample item

What is the purpose of a blood culture?

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

The answer and the reasoning

A. Detect bloodstream infection

The central Laboratory diagnosis concept identifies Detect bloodstream infection as the best answer because it directly explains the mechanism, indication, adverse effect, or organism feature described.

Option by option

  • A. Detect bloodstream infection (correct)

    Correct. Detect bloodstream infection matches the decisive point in this scenario.

  • B. Measure hemoglobin only

    Measure hemoglobin only is unsupported by the mechanism or clinical clue in the stem.

  • C. Assess lung capacity

    Assess lung capacity has another context but is not the most appropriate answer here.

  • D. Diagnose refractive error

    Diagnose refractive error does not fit the stated laboratory diagnosis relationship.

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.

More Microbiology questions

Questions about this Microbiology question

What is the answer to this Microbiology question?

The best answer is A, Detect bloodstream infection. The central Laboratory diagnosis concept identifies Detect bloodstream infection as the best answer because it directly explains the mechanism, indication, adverse effect, or organism feature described.

Why is "Measure hemoglobin only" not the answer?

Measure hemoglobin only is unsupported by the mechanism or clinical clue in the stem.

Why is "Assess lung capacity" not the answer?

Assess lung capacity has another context but is not the most appropriate answer here.

Why is "Diagnose refractive error" not the answer?

Diagnose refractive error does not fit the stated laboratory diagnosis relationship.

What concept does this question test?

It tests Laboratory diagnosis in Microbiology. The correct option holds because: Correct. Detect bloodstream infection matches the decisive point in this scenario.

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 Laboratory diagnosis?

Make a one-line identity card for each organism: shape and stain, defining test, toxin, disease and drug. Then use the flashcards and the other Microbiology 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.