Bacterial pneumonia
Bacterial pneumonia is a type of pneumonia caused by bacterial infection.
Signs and symptoms
Fever
Rigors
Cough
Runny nose (either direct bacterial pneumonia or accompanied by primary viral pneumonia)
Dyspnea - shortness of breath
Chest pain
Shaking chills
Pneumococcal pneumonia can cause coughing up of blood, or hemoptysis, characteristically associated with "rusty" sputum
Types
Gram-positive
Streptococcus pneumoniae (J13) is the most common bacterial cause of pneumonia in all age groups except newborn infants. Streptococcus pneumoniae is a Gram-positive bacterium that often lives in the throat of people who do not have pneumonia.
Other important Gram-positive causes of pneumonia are Staphylococcus aureus (J15.2) and Bacillus anthracis.
Gram-negative
Gram-negative bacteria are seen less frequently: Haemophilus influenzae (J14), Klebsiella pneumoniae (J15.0), Escherichia coli (J15.5), Pseudomonas aeruginosa (J15.1), Bordetella pertussis, and Moraxella catarrhalis are the most common.