What is the prognosis of bacterial pneumonia, and which factors contribute to increased morbidity and mortality?

Updated: Sep 30, 2020
  • Author: Justina Gamache, MD; Chief Editor: Guy W Soo Hoo, MD, MPH  more...
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Generally, the prognosis is good in otherwise healthy patients with uncomplicated pneumonia. Advanced age, aggressive organisms (eg, Klebsiella, Legionella, resistant S pneumoniae), comorbidity, respiratory failure, neutropenia, and features of sepsis, alone or in combination, increase morbidity and mortality. Left untreated, pneumonia may have an overall mortality rate of more than 30%.

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