Athlete's foot overview
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Athlete's foot overview On the Web |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]
Overview
Athlete's foot (tinea pedis) is a fungal infection of the skin that causes scaling, flaking, and itching of affected areas. It is typically transmitted in moist areas where people walk barefoot, such as showers or bathhouses. Although the condition typically affects the feet, it can spread to other areas of the body, including the groin. Athlete's foot can be prevented by good hygiene, and is treated by a number of pharmaceutical and other treatments.
Historical Perspective
The Oxford English Dictionary documents written usage of the term in 1928 (1928 Lit. Digest 22 December. 16/1), which seems to undercut the claim by W. F. Young, Inc. that the term "athlete's foot" was originated, rather than simply popularized, as part of an advertising campaign for Absorbine Jr. during the 1930s.[1]
Pahtophysiology
Athlete's foot is caused by a parasitic fungus and is a communicable disease.[2] It is typically transmitted in moist environments where people walk barefoot, such as showers, bath houses, and locker rooms.[3][4][2] It can also be transmitted by sharing footwear with an infected person, or less commonly, by sharing towels with an infected person.
Diagnosis
Physical Examination
Athlete's foot can usually be diagnosed by visual inspection of the skin, but where the diagnosis is in doubt direct microscopy of a potassium hydroxide preparation (known as a KOH test) may help rule out other possible causes, such as eczema orpsoriasis.[5] A KOH preparation is performed on skin scrapings from the affected area. The KOH preparation has an excellent positive predictive value, but occasionally false negative results may be obtained, especially if treatment with an anti-fungal medication has already begun.
Other Diagnostic Studies
A Wood's lamp, although useful in diagnosing fungal infections of the hair (Tinea capitis), is not usually helpful in diagnosing tinea pedis since the common dermatophytes that cause this disease do not fluoresce under ultraviolet light. However, it can be useful for determining if the disease is due to a non-fungal afflictor.
References
- ↑ The of W. F. Young, Inc. and Absorbine at the Absorbine website.
- ↑ 2.0 2.1 Causes of athlete's foot, at WebMD
- ↑ "Athlete's foot". Mayo Clinic Health Center.
- ↑ [1] Risk factors for athlete's foot, atWebMD
- ↑ del Palacio, Amalia. "Trends in the treatment of dermatophytosis" (PDF). Biology of Dermatophytes and other Keratinophilic Fungi: 148–158. Retrieved 2007-10-10. Unknown parameter
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