Tinea Pedis

Tinea Pedis

Dermatophyte infection of skin of the feet  footwear creates the moist warm environment for infection to develop.

Risk factors:

Multiple regression analysis has shown that most important risk factor is a family disposition. This was followed by foot deformity, attendance at public swimming baths, male gender, foot trauma, peripheral neuropathy, diabetes and impaired vascular supply .

Types:
Acute vesicular pattern:
Usually starts in arch area  vesicles and blisters are common  may spread to sides of foot. Does not usually affect weightbearing areas. Exacerbated in warmer weather.
Most commonly T.mentagrophytes.

Differential diagnosis – pustular eruptions of the palms and soles (pustulosis palmaris et plantaris); psoriasis

Chronic papulosquamous pattern:
Moccasin type distribution on foot – dry and scaly appearance.
Most commonly T. rubrum.
Scytalidium dimidiatum has been isolated from resistant cases

Chronic interdigital pattern:
Starts in toe web spaces – scaling, maceration, fissuring, erythema and itching.
Most commonly T.mentagrophytes or rubrum.

Dermatophytid reaction:
Inflammatory reactions at sites distant from the dermatophyte infection.
Hand dermatitis common.
Pathogenesis not fully understood, but probably due to a strong immunological reaction to the fungal antigens.

Related Topics:
Ultra Violet Shoe Sanitizers

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