When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow ...

When you cough up phlegm, it's called sputum. If your sputum is green, yellow, or another color, it's likely a sign of illness.

Pneumonia caused by the bacteria Streptococcus pneumoniae is associated with rust-colored sputum. Pneumonia caused by Legionella bacteria may be accompanied by abdominal pain, diarrhea, and ...

The value of signs and symptoms in differentiating between bacterial, viral, and mixed etiology in patients with community-acquired pneumonia. Journal of medical microbiology, 63 (Pt 3), 441–452 ...

Your body makes phlegm, aka mucus, to sweep out harmful bacteria and allergens. The color of the phlegm can depend on the causes. Here are possible reasons why it’s brown.

Epidemiology Review of the literature shows a widely varying incidence of pneumonia in the pregnant population, reflecting both the population studied and the era in which the survey was conducted ...

This results in increased mucus secretion and may cause breathlessness as well.” In contrast, pneumonia is a lung infection where the air sacs (alveoli) become inflamed and fill with fluid or pus.

Meningococci were isolated from sputum cultures of 30% of patients who had acute pneumonia, and from a similar proportion of specimens from patients with acute or secondary respiratory illnesses ...