Tinea versicolor
from class: Microbiology Definition Tinea versicolor is a superficial fungal infection caused by the yeast Malassezia. It leads to discolored patches on the skin, often exacerbated by sun exposure.
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Predict what's on your test 5 Must Know Facts For Your Next Test Tinea versicolor is treated with topical antifungal agents such as clotrimazole or miconazole. The causative agent, Malassezia, is part of the normal skin flora but can become pathogenic under certain conditions. Oral antifungals like fluconazole may be prescribed for extensive or refractory cases. Hypopigmented or hyperpigmented patches are common symptoms due to the yeast's interference with melanin production. Diagnosis can be confirmed using a KOH (potassium hydroxide) preparation, which reveals hyphae and yeast cells. Review Questions What organism causes tinea versicolor and how does it affect the skin? Which topical antifungal treatments are commonly used for tinea versicolor? How can tinea versicolor be diagnosed in a laboratory setting?
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