Sputum is a thick fluid that is produced in the lungs and in the
airways that lead to the lungs. Sputum is different than saliva.
A person who has an infection or disease of the respiratory system
may cough up sputum. Some diseases can cause pus, blood, or bacteria to show up in the sputum.
November 1, 2012
Adam Husney, MD - Family Medicine & Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology
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