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Alternative names
Sputum culture
Definition
Sputum is a secretion that is produced in the lungs and the bronchi (tubes that carry the air to the lung). This mucus-like secretion may become infected, bloodstained, or contain abnormal cells that may lead to a diagnosis. Sputum is what comes up with deep coughing.
How the test is performed
You are asked to cough deeply and spit any sputum in 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 organisms 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.
Why the test is performed
The cultures and tests are done on the sputum to screen for bacteria causing an infection in the lungs or the airways (bronchi).
Normal Values
No presence of disease-causing organisms in the sputum is normal.
What abnormal results mean
The abnormal results will be reported as a positive culture. That means that there is a disease-producing organism found that may help diagnose bronchitis, tuberculosis, a lung abscess, or pneumonia.
What the risks are
There are no risks with this method of obtaining a sample. |
