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 organism is classically associated with painless genital chancre?

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

The answer and the reasoning

B. Treponema pallidum

Primary syphilis due to Treponema pallidum typically causes a painless indurated ulcer with regional lymphadenopathy at the inoculation site.

Option by option

  • A. Haemophilus ducreyi

    H. ducreyi causes painful chancroid.

  • B. Treponema pallidum (correct)

    Correct: painless indurated chancre is primary syphilis.

  • C. Candida albicans

    Candida causes itch and discharge.

  • D. Herpes simplex virus

    Herpes ulcers are painful vesicular lesions.

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, Treponema pallidum. Primary syphilis due to Treponema pallidum typically causes a painless indurated ulcer with regional lymphadenopathy at the inoculation site.

Why is "Haemophilus ducreyi" not the answer?

H. ducreyi causes painful chancroid.

Why is "Candida albicans" not the answer?

Candida causes itch and discharge.

Why is "Herpes simplex virus" not the answer?

Herpes ulcers are painful vesicular lesions.

What concept does this question test?

It tests Bacteriology in Microbiology. The correct option holds because: Correct: painless indurated chancre is primary syphilis.

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.