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

Which bacterium causes erysipelas with a sharply demarcated raised edge?

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

The answer and the reasoning

A. Streptococcus pyogenes

Group A Streptococcus commonly causes erysipelas, a superficial dermal infection with a sharply demarcated erythematous raised border.

Option by option

  • A. Streptococcus pyogenes (correct)

    Correct: GAS is a classic erysipelas cause.

  • B. Borrelia burgdorferi

    Borrelia causes Lyme disease.

  • C. Pseudomonas aeruginosa

    Pseudomonas has other wound and ear syndromes.

  • D. Clostridium perfringens

    C. perfringens causes gas gangrene.

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, Streptococcus pyogenes. Group A Streptococcus commonly causes erysipelas, a superficial dermal infection with a sharply demarcated erythematous raised border.

Why is "Borrelia burgdorferi" not the answer?

Borrelia causes Lyme disease.

Why is "Pseudomonas aeruginosa" not the answer?

Pseudomonas has other wound and ear syndromes.

Why is "Clostridium perfringens" not the answer?

C. perfringens causes gas gangrene.

What concept does this question test?

It tests Bacteriology in Microbiology. The correct option holds because: Correct: GAS is a classic erysipelas cause.

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.