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Sputum smear (KOH test) How the Test is Performed:
Obtain a sputum sample by coughing deeply and expelling the material that comes from the lungs (sputum) into a specimen container. A smear of sputum is prepared with a potassium hydroxide (KOH) and examined under the microscope. If it is positive, fungal cells can be observed.
How to Prepare:
There is no special preparation.
How it Feels:
There is no discomfort.
Risks:
There are no risks.
Why this Test is Performed:
The test may be performed when there is abnormal sputum production or when an infection of the lungs is suspected.
Normal Values:
No presence of organisms is normal.
Abnormal Results:
Abnormal results indicate the presence of fungus such as coccidioidomycosis or blastomycoses. White blood cells called eosinophils may also be present.
Additional conditions under which the test may be performed:
Cost:
The estimated cost is $15.
Special Considerations:
Not applicable.
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