Bacteria Home > Bacterial Pneumonia
When pneumonia is caused by Streptococcus pneumoniae, Mycoplasma pneumoniae, or other bacteria, it's called bacterial pneumonia. This illness can affect both children and adults, and is more common during the winter. People with this type of pneumonia usually start to feel better three to five days after starting antibiotics. However, some people will need up to a month before resuming their normal activities.
What Is Bacterial Pneumonia?Pneumonia is an infection in one or both lungs. It can be caused by a number of different germs, including bacteria, viruses, and fungi. When caused by bacteria, the illness is known as bacterial pneumonia.
- Streptococcus pneumoniae, also known as just pneumococcus (the most common cause of pneumonia worldwide)
- Mycoplasma pneumoniae, the main cause of walking pneumonia (see Mycoplasma Pneumonia)
- Haemophilus influenzae
- Chlamydophila pneumoniae (more common in children under four months of age or over the age of five)
- Legionella pneumophila
- Bordetella pertussis (the bacteria that cause whooping cough).
- Gram-negative bacteria, such as Escherichia coli, Klebsiella pneumoniae, Enterobacter species, Pseudomonas aeruginosa, and Acinetobacter species
- Staphylococcus aureus, including methicillin-resistant S. aureus (MRSA)
- Streptococcus species.