STI: Mycoplasma genitalium: practice question

A Dermatology 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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Dermatology · STI: Mycoplasma genitalium

Sample item

A man has persistent urethritis after a course of doxycycline for presumed chlamydia, and tests for gonorrhoea and chlamydia are negative. Which organism, lacking a cell wall, is a likely cause?

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

The answer and the reasoning

D. Mycoplasma genitalium

Mycoplasma genitalium is a cell-wall-deficient bacterium that causes persistent or recurrent nongonococcal urethritis, with resistance to azithromycin and poor response to doxycycline. Moxifloxacin is used for resistant cases.

Option by option

  • A. Chlamydia trachomatis

    Chlamydia typically responds to doxycycline and tested negative.

  • B. Trichomonas vaginalis

    Trichomonas is a flagellate protozoan and not cell wall deficient.

  • C. Neisseria gonorrhoeae

    Gonorrhoea tested negative.

  • D. Mycoplasma genitalium (correct)

    Correct. M. genitalium commonly causes persistent NGU after doxycycline.

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 Dermatology questions

Questions about this Dermatology question

What is the answer to this Dermatology question?

The best answer is D, Mycoplasma genitalium. Mycoplasma genitalium is a cell-wall-deficient bacterium that causes persistent or recurrent nongonococcal urethritis, with resistance to azithromycin and poor response to doxycycline.

Why is "Chlamydia trachomatis" not the answer?

Chlamydia typically responds to doxycycline and tested negative.

Why is "Trichomonas vaginalis" not the answer?

Trichomonas is a flagellate protozoan and not cell wall deficient.

Why is "Neisseria gonorrhoeae" not the answer?

Gonorrhoea tested negative.

What concept does this question test?

It tests STI: Mycoplasma genitalium in Dermatology. Moxifloxacin is used for resistant cases.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. 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 STI: Mycoplasma genitalium?

Learn each condition by its primary lesion, site and signature sign. Then use the flashcards and the other Dermatology 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.