Erythrasma

Erythrasma is a chronic superficial infection of the intertriginous areas of the skin. This is a bacterial infection and can be found between the toes. It commonly occurs between the 3rd and 4th toes.


History/Physical:

This infection usually occurs in areas of body folds that are moist. The infection can be asymptomatic or itching may be associated with the infection.

The infection consists of a well-defined area with brown-red patches commonly found. Scaling may be present, as well as fissuring and maceration. The affected area may resemble athlete's foot.


Causes:
Corynebacterium minutissimum - A bacterium found on the skin


Predisposing factors:

Excessive sweating

Obesity

Diabetes mellitus

Warm climate

Poor hygiene



Differential Diagnosis:

Candidiasis

Contact dermatitis

Psoriasis

Tinea pedis (athlete's foot)



Workup:

Wood light examination - Reveals coral red fluorescence

Gram stain - Reveals gram-positive filamentous rods



Treatment:

Antibiotics - Erythromycin is the drug of choice. Your doctor may prescribe 1-2 weeks of antibiotic therapy.

Your doctor may also prescribe a topical antibiotic to treat this infection.