Sputum consists of mucus and other material originating from the airways that is expectorated through the mouth.
In pneumonia which is generally defined as lung inflammation, there is a response of the lung(s) to harmful agents such as bacteria, viruses, fungi, parasites and so on.
The non-motile bacterium Klebsiella pneumoniae can result in sputum tinged with blood giving it a look not unlike red currant jelly – red currant jelly sputum.
Underlying conditions such as diabetes mellitus, alcohol misuse, long standing lung disease, etc. predispose to Klebsiella pneumonia.
Clinical manifestations of pneumonia include a cough, feeling lethargic, having a hot body, difficulty breathing, sputum production, chest pain, etc. Treatment for pneumonia usually includes antibiotics.
Johnson AL, Hampson DF, Hampson NB. Sputum color: potential implications for clinical practice. Respir Care, 2008 53(4):450-4. Go to reference
Symptoms of pneumonia, Klebsiella pneumoniae