Monday, 15 November 2010

MRCP revision battle 50.7: Erythrasma

Erythrasma is a skin condition characterised by asymptomatic initially pink patches that become brown as the skin sheds.

Erythrasma is caused by corynebacterium, a gram positive bacteria.

If a woods lamp is held near a patch of erythrasma the erythrasma glows coral red due to porphyrins released by the bacteria.

It is commonest amongst diabetics and the obese.

Treatment is with topical fusidic acid/clindamycin or oral erythromycin if extensive.