KOH (Potassium hydroxide) staining is a simple, non-invasive test that helps diagnose fungal infections in sputum. Cells are collected from the affected area and examined for signs of fungal infections under a microscope. A KOH test is recommended for individuals with the symptoms of fungal skin infections such as a localized rash, red patches which are ring-shaped with scaly edges, Rashes that did not respond to or worsened with corticosteroid medications or those that persist for months A KOH test does not explicitly identify the type of fungus; it only shows that fungus is present. In most cases, knowing the fungus precisely causing the rash may not be necessary. The doctor can make an informed judgment and prescribe treatment.
The test involves taking a sample of the affected skin, hair, or nails and placing it on a glass slide. A drop of potassium hydroxide (KOH) solution is then added to the sample, which helps to dissolve keratin and other debris, making it easier to visualize the microorganisms under a microscope.
The KOH mount is primarily used to diagnose fungal infections of the skin, hair, or nails, such as tinea (ringworm), candidiasis, or dermatophytosis. Fungal elements, such as hyphae (thread-like structures) or spores, can be observed under the microscope after the KOH solution has dissolved the non-fungal components.
The test is relatively simple and quick to perform, allowing healthcare professionals to obtain a preliminary evaluation of a suspected fungal infection. If the KOH mount shows evidence of fungi, further testing, such as fungal culture or molecular tests, may be performed to identify the specific fungus causing the infection.
It's important to note that while a KOH mount can be helpful in diagnosing fungal infections, it may not identify all fungal species, and other tests may be required for accurate diagnosis. Additionally, the test should be performed by a trained healthcare professional who can interpret the results accurately within the appropriate clinical context.
Report Time:
24 Hours
Fasting Time:
Free
Recommended Test:
Male, Female
Recommended age:
5-99 Years
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