Sputum

Healthwise
By Jeannette Curtis; Caroline Rea, RN, BS, MS

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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.

Author:Jeannette Curtis
Caroline Rea, RN, BS, MS
Medical Review:
Last Updated: 05/25/2007