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Sputum smear (KOH test)DefinitionSputum smear (KOH test) is a test for the presence of fungal microorganisms in sputum. Alternative NamesKOH test; Fungal smearHow the Test is PerformedObtain 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. How to Prepare for the TestThere is no special preparation. How the Test Will FeelThere is no discomfort. Why the Test is PerformedThe test may be performed when there is abnormal sputum production or when an infection of the lungs is suspected. Normal ResultsNo presence of organisms is normal. What Abnormal Results MeanAbnormal results indicate the presence of fungus such as histoplasmosis, coccidioidomycosis, or blastomycoses. White blood cells called eosinophils may also be present. Additional conditions under which the test may be performed:
RisksThere are no risks. ConsiderationsNot applicable.
Review Date:
2/10/2006 Reviewed By: Kenneth Wener, M.D., Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, MA. Review provided by VeriMed Healthcare Network. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-
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