Sputum smear (KOH test)

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Sputum test

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Sputum smear (KOH test)

Sputum smear (KOH test) is a test for the presence of fungal microorganisms in sputum.

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 potassium hydroxide (KOH) and examined under the microscope. If it is positive, fungal cells can be observed.

There is no special preparation.

There is no discomfort.

The test may be performed when there is abnormal sputum production or when an infection of the lungs is suspected.

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