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Erythrasma: Wikis


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Classification and external resources
ICD-10 L08.1
ICD-9 039.0
DiseasesDB 29630
MedlinePlus 001470
eMedicine derm/140
MeSH D004894

Erythrasma is a skin disease that can result in pink patches, which can turn into brown scales. It is caused by the bacterium Corynebacterium minutissimum.

It is most commonly found in folds of skin (e.g. armpit, groin, under breast).

It is prevalent among diabetics, the obese, and in warm climates. It is worsened by wearing occlusive clothing.


A Wood's lamp is useful in diagnosing erythrasma. The ultraviolet light of a Wood's lamp causes the organism to fluoresce a coral red color, differentiating it from fungal infections and other skin conditions.


It can be treated with erythromycin, fucidin cream or ointment, or with antibacterial soap. Some studies have shown resolution with the use of Zithromax (azithromycin).

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