The germ is found in the sputum and in the nasal secretions.
Do not dress if the temperature is above 99 degrees, or if there is blood in the sputum.
It is the sputum after its discharge from the body on which our attention must be fixed.
The sputum should be fresh—not more than three or four hours' old.
The sputum should always be examined, both unstained and stained.