The importance of pneumonia as a major health concern may be gleaned by the following facts about this disease.
- Pneumonia can be caused by several agents. It is important to know the cause, as treatment varies. The important causes include -
- Bacteria – usually caused by Streptococcus pneumoniae
Having viral pneumonia increases the risk of secondary bacterial pneumonia.
- Recently, emerging infections such as avian flu epidemics and pandemics, severe acute respiratory syndrome (SARS), coronavirus, Middle Eastern Respiratory Syndrome (MERS) are also associated with pneumonia. Environmental reservoirs such as Legionella can cause localized outbreaks. Anthrax, considered a bio-weapon can also cause pneumonia.