tailieunhanh - Evidence based Dermatology - part 7

Bàn chân hoặc bệnh nấm da chân của vận động viên là thường xuyên nhất gây ra bởi cuộc xâm lược (bịnh ghe) dermatophyte của da của bàn chân. Thường biểu hiện ở một trong ba cách: interdigital da xuất hiện được tẩm ướt (trắng) và sũng nước | 32 Athlete s foot Fay Crawford Background Definition Athlete s foot or tinea pedis is most frequently caused by dermatophyte ringworm invasion of the skin of the feet. It usually manifests in one of three ways interdigital skin appears macerated white and soggy patches of skin on the foot may be affected by recurrent vesicular eruptions which make the skin itchy and red and finally the soles of the feet including the sides and heels can appear dry and Figure Athlete s foot Incidence prevalence Tinea infections are common. It has been estimated that 15 of the general population have a fungal infection of the Gentles and Evans3 found the prevalence of athlete s foot to be 21-5 in a sample of adult male swimmers but the prevalence amongst adult females participating in the same survey was only 3-3 . Aetiology The dermatophytes most frequently reported in clinical trials to be present on patients skin at trial entry are Trichophyton rubrum T. mentagrophytes Epidermophyton floccosum and T Scaling fissuring pruritus and itching are some of the clinical features of fungal infections of the skin and it is these irritations that make the patient seek treatment. The natural history of the condition if untreated is a chronic worsening infection which can lead to fissuring and breaks in the epidermis. Although the condition will not resolve spontaneously some evidence from cure rates collected from people in the placebo arms of controlled trials suggests that improved foot hygiene alone may cure the infection in a proportion of 6 Diagnosis The use of laboratory tests to diagnose the presence of dermatophyte infection is very important because athlete s foot can be mistaken for other skin conditions. For example interdigital maceration can look exactly like interdigital athlete s foot and juvenile chronic dermatosis and bacterial infections such as erythrasma can also have a similar appearance to fungal infections on the skin of the

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