Impetigo | Figure 4.7
A: Impetigo
(Courtesy of Dr. Paul Getz)
B: Bullous impetigo, arm
C: SSSS
(Reprint from Allen HB.
Dermatology Terminology.
New York, NY: Springer; 2010) |
(Figure 4.7A, B) - Highly contagious infection seen primarily in children
- Two types: bullous and nonbullous
- Nonbullous: S.aureus most common cause, less common Gr. A strep (GAS)
- Erythematous macule → pustule/vesicle → erosion with golden crust (+ culture from exudate under crust)
- Bullous : S.aureus ONLY (usually phage II, type 71)
- Flaccid, transparent bullae → rupture leaving shiny, dry erosion with no surrounding erythema, ± fever, diarrhea, weakness
- Cleavage at granular layer due to ET (A/B) binding to desmoglein 1; S.aureusat site of lesion ← Unlike SSSS
- Treat with topical mupirocin, if extensive can use oral antibiotic (i.e., cephalexin, dicloxacillin, etc.)
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