Gastrointestinal 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 · Gastrointestinal microbiology

Sample item

Which pathogen is associated with Guillain-Barré syndrome after gastroenteritis?

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

The answer and the reasoning

D. Campylobacter jejuni

Campylobacter jejuni infection can trigger immune cross-reactivity against peripheral nerves, contributing to Guillain-Barré syndrome after diarrhoeal illness.

Option by option

  • A. Rotavirus

    Rotavirus commonly affects children.

  • B. Vibrio cholerae

    Vibrio causes secretory diarrhoea without this classic link.

  • C. Staphylococcus aureus

    S. aureus food poisoning is toxin-mediated.

  • D. Campylobacter jejuni (correct)

    Correct: Campylobacter is a classic preceding infection.

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, Campylobacter jejuni. Campylobacter jejuni infection can trigger immune cross-reactivity against peripheral nerves, contributing to Guillain-Barré syndrome after diarrhoeal illness.

Why is "Rotavirus" not the answer?

Rotavirus commonly affects children.

Why is "Vibrio cholerae" not the answer?

Vibrio causes secretory diarrhoea without this classic link.

Why is "Staphylococcus aureus" not the answer?

S. aureus food poisoning is toxin-mediated.

What concept does this question test?

It tests Gastrointestinal microbiology in Microbiology. The correct option holds because: Correct: Campylobacter is a classic preceding infection.

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 Gastrointestinal 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.