Sputum

Sputum is a thick fluid that is produced in the lungs and in the airways that lead to the lungs. It may contain mucus, pus, blood or blood proteins, bacteria, and saliva.

A person who has an infection or disease of the respiratory system may cough up sputum.

Last Updated: March 10, 2009

Author: Monica Rhodes

Medical Review: Caroline S. Rhoads, MD - Internal Medicine & R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care, Medical Toxicology

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