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Sputum test
Sputum test


Routine sputum culture

Definition:

Routine sputum culture is a test of secretions from the lungs and bronchi (tubes that carry air to the lung) to look for bacteria that cause infection.



Alternative Names:

Sputum culture



How the test is performed:

You will cough deeply and spit any sputum into a sterile cup. The sputum is then taken to the laboratory. There, it is placed in a special substance (medium) under conditions that allow the bacteria or fungi to grow.



How to prepare for the test:

Drinking a lot of water and other fluids the night before the test may help to get the sample.



How the test will feel:

You will need to cough. Sometimes the health care provider will tap on the chest to loosen deep sputum. There may be a steam-like mist to inhale to help you cough up the sample.



Why the test is performed:

The culture is done on the sputum to help identify the bacteria that are causing an infection in the lungs or airways (bronchi).



Normal Values:

In a normal sputum sample there will be no disease-causing organisms present.



What the risks are:

There are no risks with this method of obtaining a sample.



Special considerations:

Sometimes a Gram stain or AFB stain of the sputum done at the same time can help make the diagnosis.




Review Date: 10/15/2009
Reviewed By: Daniel Levy, MD, Infectious Disease, Maryland Family Care, Lutherville, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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