Bacteriology: 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 · Bacteriology

Sample item

What organism causes typhoid fever?

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

The answer and the reasoning

B. Salmonella Typhi

Salmonella Typhi causes enteric fever after fecal-oral transmission, with systemic illness and potential chronic gallbladder carriage.

Option by option

  • A. Yersinia pestis

    Y. pestis causes plague.

  • B. Salmonella Typhi (correct)

    Correct: S. Typhi is the agent of typhoid fever.

  • C. Shigella dysenteriae

    Shigella causes inflammatory dysentery.

  • D. Bacillus cereus

    B. cereus commonly causes food poisoning syndromes.

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 B, Salmonella Typhi. Salmonella Typhi causes enteric fever after fecal-oral transmission, with systemic illness and potential chronic gallbladder carriage.

Why is "Yersinia pestis" not the answer?

Y. pestis causes plague.

Why is "Shigella dysenteriae" not the answer?

Shigella causes inflammatory dysentery.

Why is "Bacillus cereus" not the answer?

B. cereus commonly causes food poisoning syndromes.

What concept does this question test?

It tests Bacteriology in Microbiology. The correct option holds because: Correct: S. Typhi is the agent of typhoid fever.

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 Bacteriology?

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.