Question
All of the following skin infections are caused by S aureus, EXCEPT:
| A. |
Folliculitis
|
| B. |
Furuncle
|
| C. |
Cellulitis
|
| D. |
Erysipelas
|
Show Answer
|
Correct Answer � D
Explanation
|
|
Erysipelas is caused almost exclusively by Streptococcus pyogenes.
It is characterized by abrupt onset of fiery red, swelling of face or extremities.
It has well defined margins along the nasolabial fold, and has rapid progression with intense pain. It usually affects the face and legs.
Bacterial infections and associated organisms:
|
Infection
|
Organism
|
|
Folliculitis
|
S. aureus, Pseudomonas aeruginosa
|
|
Furuncle/Carbuncle
|
S. aureus
|
|
Abscess
|
Polymicrobial , S. aureus in one quarter
|
|
Erysipelas
|
Streptococcus pyogenes
|
|
Cellulitis
|
S. aureus, Streptococcus pyogenes
|
|
Ecthyma
|
S. aureus, Streptococcus pyogenes
|
|
Impetigo
|
S. aureus, Streptococcus pyogenes
|
Ref: Skin Infections: Diagnosis and Treatment edited by John C. Hall page 19.
