Question:medium
Which of the following organisms is NOT a cause of urethritis?
Which of the following organisms is NOT a cause of urethritis?
Show Hint
One of these makes a painful genital ulcer, not a urethral discharge, that is the odd one out.
Updated On: Jun 23, 2026
- Trichomonas vaginalis
- Haemophilus ducreyi
- Chlamydia trachomatis
- Gonococcus (Neisseria gonorrhoeae)
Show Solution
The Correct Option is B
Solution and Explanation
Syndrome-sorting approach. Split STD organisms by what syndrome they produce. Urethritis means inflammation of the urethra with discharge and dysuria, and its roll call is gonococcus (gonococcal type) plus chlamydia, Trichomonas vaginalis, Mycoplasma genitalium and HSV (non-gonococcal type). Three options, gonococcus, chlamydia and trichomonas, sit squarely in that list. Haemophilus ducreyi belongs to a different bucket: it is the agent of chancroid, a soft, painful, ragged genital ULCER paired with tender, suppurating buboes in the groin. An ulcer-and-bubo bug is not a discharge-and-dysuria bug, so it is the one not involved in urethritis. Answer: Haemophilus ducreyi.
Was this answer helpful?
0
