phuluong2k
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A 4-year-old girl is brought to the physician because of a crusted honey-colored erythema resulting from rupture of tiny vesicles and pustules. Her temperature is 37.7 C (102 F). Skin lesions are distributed over the face and extremities. Physical examination reveals enlargement of lymph nodes in the cervical and axillary regions. Which of the following is the most frequent pathogen of this skin infection?
A. Human herpesvirus 7
B. Staphylococcus aureus
C. Streptococcus pyogenes
D. Propionibacterium acnes
E. Trychophyton fungi
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| chemamr
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C or B??. How do you know? .
I would choose C.
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| frontal
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Impetigo? Streptococcus is most frequently responsible.
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| Doc2378
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c
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| ARJ
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My first guess was C Streptococcus pyogenes
But the answer I think is B. Staphylococcus aureus
From CMDT
Impetigo is a contagious and autoinoculable infection of the skin caused by staphylococci or streptococci (or both). Classically, two forms have been recognized: (1) a vesiculopustular type, with thick golden-crusted lesions caused by Staphylococcus aureus or group A ß-hemolytic streptococcus; and (2) a bullous type, associated with phage group II S aureus. However, most cases of impetigo of either presentation now appear to be due to staphylococci.
Thanks Phuluong
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| phuluong2k
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Good reference ARJ
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