Infection control: 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 · Infection control

Sample item

What is the purpose of negative-pressure isolation for airborne infection?

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

The answer and the reasoning

D. Prevent contaminated air escaping to adjacent areas

Negative-pressure rooms direct air inward and exhaust or filter contaminated air, reducing spread of airborne pathogens outside the isolation space.

Option by option

  • A. Replace respiratory protection

    Respiratory PPE may still be required.

  • B. Sterilize patient clothing automatically

    Clothing still requires standard handling.

  • C. Increase room humidity only

    Humidity alone is not the purpose.

  • D. Prevent contaminated air escaping to adjacent areas (correct)

    Correct: inward airflow contains airborne particles.

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 Microbiology question

What is the answer to this Microbiology question?

The best answer is D, Prevent contaminated air escaping to adjacent areas. Negative-pressure rooms direct air inward and exhaust or filter contaminated air, reducing spread of airborne pathogens outside the isolation space.

Why is "Replace respiratory protection" not the answer?

Respiratory PPE may still be required.

Why is "Sterilize patient clothing automatically" not the answer?

Clothing still requires standard handling.

Why is "Increase room humidity only" not the answer?

Humidity alone is not the purpose.

What concept does this question test?

It tests Infection control in Microbiology. The correct option holds because: Correct: inward airflow contains airborne particles.

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 Infection control?

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.