If you are experiencing a medical emergency please dial 911 immediately
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.
Last Revised: November 3, 2011
Author: Healthwise Staff
Medical Review: E. Gregory Thompson, MD - Internal Medicine & Amy McMichael, MD - Dermatology
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.