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Tinea versicolor fluorescence under Wood's lamp. Tinea versicolor may be diagnosed by a potassium hydroxide (KOH) preparation and lesions may fluoresce copper-orange when exposed to Wood's lamp (UV-A light). [15] The differential diagnosis for tinea versicolor infection includes: [citation needed] Progressive macular hypomelanosis; Pityriasis alba
However, a simple side-room investigation with a Wood's lamp is additionally useful in diagnosing erythrasma. [4] The ultraviolet light of a Wood's lamp causes the organism to fluoresce a characteristic coral red color, differentiating it from other skin conditions such as tinea versicolor, which may fluoresce a copper-orange color. [5]
Tinea manuum: fungal infection of the hands and palm area; Tinea capitis: fungal infection of the scalp and hair; Tinea faciei (face fungus): fungal infection of the face; Tinea barbae: fungal infestation of facial hair; Other superficial mycoses (not classic ringworm, since not caused by dermatophytes) Tinea versicolor: caused by Malassezia furfur
Tinea versicolor (also known as dermatomycosis furfuracea, pityriasis versicolor, and tinea flava) [2] is a condition characterized by a skin eruption on the trunk and proximal extremities, hypopigmentation macule in area of sun induced pigmentation. During the winter the pigment becomes reddish brown.
Athlete's foot, known medically as tinea pedis, is a common skin infection of the feet caused by a fungus. [2] Signs and symptoms often include itching, scaling, cracking and redness. [ 3 ] In rare cases the skin may blister . [ 6 ]
[3] [6] Superficial fungal infections include common tinea of the skin, such as tinea of the body, groin, hands, feet and beard, and yeast infections such as pityriasis versicolor. [7] Subcutaneous types include eumycetoma and chromoblastomycosis, which generally affect tissues in and beneath the skin.
Tinea capitis caused by species of Microsporum and Trichophyton is a contagious disease that is endemic in many countries. Affecting primarily pre- pubertal children between 6 and 10 years, it is more common in males than females; rarely does the disease persist past age sixteen. [ 17 ]
The least invasive test is a visual inspection in the clinic using a Wood's Lamp. [11] A KOH test can also be used, where skin scraping of the affected skin may also be taken and prepared with potassium hydroxide (KOH) and visualized under a microscope to look for Malassezia or other microbiological cells.
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