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Dermatology · Bacterial skin infection
Sample itemWhich organism is a common cause of nonbullous impetigo?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Staphylococcus aureus
Nonbullous impetigo is commonly caused by Staphylococcus aureus, sometimes with group A streptococci; it remains a superficial bacterial infection of the epidermis.
Option by option
A. Candida albicans
Candida causes fungal infections rather than typical bacterial impetigo.
B. Staphylococcus aureus (correct)
Correct: Staphylococcus aureus commonly causes nonbullous impetigo.
C. Mycobacterium tuberculosis
Mycobacterium tuberculosis does not usually cause superficial impetigo.
D. Varicella-zoster virus
Varicella-zoster virus causes vesicular viral eruptions, not impetigo.
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.