sputum

Invented in 1983, PCR is a multi-step test to detect infectious agents, including viruses in humans, using a sample of sputum or other genetic material.

Third, the virus could not be found in sputum, further supporting the clear observation that airborne spread does not occur.

It, or a similar bacillus, is sometimes found in the sputum of gangrene of the lung.

It is to be remembered, however, that a few of these bacteria may reach the sputum from the upper air-passages.

It is sometimes met with in the sputum of catarrhal pneumonia, bronchitis, and tuberculosis.

Diplococci without capsules are common in the sputum, but have no special significance.

It is especially useful with cultures upon serum media, but is applicable also to the sputum.