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A potassium hydroxide (KOH) test is done to determine whether a
fungus is causing a skin infection. Samples from an infected area are treated
with KOH, which dissolves skin cells and leaves behind fungus cells (if any are
present) that can been seen with a microscope.
The KOH test may be used to diagnose fungal infections, such as
thrush, tinea versicolor, and ringworm.
Current as of:
February 20, 2015
E. Gregory Thompson, MD - Internal Medicine & Randall D. Burr, MD - Dermatology
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