A sputum fungal smear is a laboratory test that looks for fungus in a sputum sample.
Sputum is the material that comes up from air passages when you cough very deeply.
KOH test; Fungal smear - sputum
How the test is performed:
A sputum sample is needed. You will be asked to cough deeply and spit any material that comes up from your lung into a special container.
The sample is sent to a lab. A small amount is lightly smeared onto a microscope slide and mixed with potassium hydroxide (KOH). The slide is examined under the microscope and checked for fungus parts.
How to prepare for the test:
There is no special preparation.
How the test will feel:
There is no discomfort.
Why the test is performed:
Your doctor may order this test if you have abnormal sputum production or signs of a lung infection.
A normal test should show no fungus on the microscope slide.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What the risks are:
There are no risks associated with a sputum fungal smear.