Outbreak investigation: practice question

A PSM 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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PSM · Outbreak investigation

Sample item

What does a spot map help identify in an outbreak?

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

The answer and the reasoning

B. Geographic clustering of cases

A spot map places cases by location and can reveal clustering around a water source, food outlet, workplace, or other shared exposure.

Option by option

  • A. Laboratory contamination source always

    Maps do not always prove contamination source.

  • B. Geographic clustering of cases (correct)

    Correct: geography can reveal exposure clusters.

  • C. Exact incubation period

    Incubation is inferred from time data.

  • D. Individual genetic sequence only

    Genetic sequencing needs laboratory methods.

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 PSM questions

Questions about this PSM question

What is the answer to this PSM question?

The best answer is B, Geographic clustering of cases. A spot map places cases by location and can reveal clustering around a water source, food outlet, workplace, or other shared exposure.

Why is "Laboratory contamination source always" not the answer?

Maps do not always prove contamination source.

Why is "Exact incubation period" not the answer?

Incubation is inferred from time data.

Why is "Individual genetic sequence only" not the answer?

Genetic sequencing needs laboratory methods.

What concept does this question test?

It tests Outbreak investigation in PSM. The correct option holds because: Correct: geography can reveal exposure clusters.

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 Outbreak investigation?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM 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.