This is a superficial chronic infection caused by a bacteria called Corynebacterium minutissimus. It is most commonly seen in the groin, armpits and in the folds. There are fairly well defined large brown patches with some fine scale wrinkling on the surface. Initially there is a light red colour which became brownish in time. There are usually no symptoms associated with this. The diagnosis can be confirmed by examination of the skin with Woods light. This is ultraviolet A which identifies the infected area by a bright coral red fluorescent colour.
Anti- bacterial soaps as well as topical antibiotics can clear this problem.
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