STI: epididymo-orchitis: 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: epididymo-orchitis

Sample item

A 24-year-old sexually active man has acute unilateral scrotal pain and swelling with urethral discharge. Which organisms are most likely?

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

The answer and the reasoning

D. Neisseria gonorrhoeae and Chlamydia trachomatis

In sexually active men under 35, epididymo-orchitis is usually due to gonorrhoea or chlamydia and is treated with ceftriaxone and doxycycline. In older men or after anal intercourse, enteric organisms such as E. coli are more common.

Option by option

  • A. Escherichia coli

    E. coli is typical in older men with urinary tract abnormalities.

  • B. Mumps virus only

    Mumps orchitis follows parotitis, not urethral discharge.

  • C. Mycobacterium tuberculosis

    Tuberculosis causes a chronic painless epididymal mass.

  • D. Neisseria gonorrhoeae and Chlamydia trachomatis (correct)

    Correct. Sexually transmitted pathogens dominate in young men.

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 Dermatology question

What is the answer to this Dermatology question?

The best answer is D, Neisseria gonorrhoeae and Chlamydia trachomatis. In sexually active men under 35, epididymo-orchitis is usually due to gonorrhoea or chlamydia and is treated with ceftriaxone and doxycycline.

Why is "Escherichia coli" not the answer?

E. coli is typical in older men with urinary tract abnormalities.

Why is "Mumps virus only" not the answer?

Mumps orchitis follows parotitis, not urethral discharge.

Why is "Mycobacterium tuberculosis" not the answer?

Tuberculosis causes a chronic painless epididymal mass.

What concept does this question test?

It tests STI: epididymo-orchitis in Dermatology. In older men or after anal intercourse, enteric organisms such as E. coli are more common.

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 STI: epididymo-orchitis?

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.