Laboratory microbiology: 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 microbiology

Sample item

Why are blood cultures collected before antibiotics when feasible?

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

The answer and the reasoning

A. Increase chance of identifying causative organism

Cultures obtained before antimicrobials improve recovery of bloodstream pathogens and enable susceptibility-guided treatment, but therapy should not be dangerously delayed.

Option by option

  • A. Increase chance of identifying causative organism (correct)

    Correct: pre-treatment cultures improve microbiological yield.

  • B. Eliminate need for aseptic technique

    Aseptic technique prevents contamination.

  • C. Prevent all sepsis complications

    Cultures do not prevent complications alone.

  • D. Make antibiotics unnecessary

    Antibiotics may still be essential.

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, Increase chance of identifying causative organism. Cultures obtained before antimicrobials improve recovery of bloodstream pathogens and enable susceptibility-guided treatment, but therapy should not be dangerously delayed.

Why is "Eliminate need for aseptic technique" not the answer?

Aseptic technique prevents contamination.

Why is "Prevent all sepsis complications" not the answer?

Cultures do not prevent complications alone.

Why is "Make antibiotics unnecessary" not the answer?

Antibiotics may still be essential.

What concept does this question test?

It tests Laboratory microbiology in Microbiology. The correct option holds because: Correct: pre-treatment cultures improve microbiological yield.

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 microbiology?

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.