What is pneumonia?

    Last Updated: October 25, 2023

    Pneumonia is an infection of the alveoli (air sacs) and lower airways in the lungs that causes inflammation and fluid accumulation. There are two main types: community acquired pneumonia (CAP) and nosocomial pneumonia (acquired in the hospital). Many pathogens, including bacteria, fungi, and viruses, can cause pneumonia,[1] but, in some cases, the cause cannot be identified.[2]

    References

    1. ^Torres A, Cilloniz C, Niederman MS, Menéndez R, Chalmers JD, Wunderink RG, van der Poll TPneumonia.Nat Rev Dis Primers.(2021-Apr-08)
    2. ^Musher DM, Abers MS, Bartlett JGEvolving Understanding of the Causes of Pneumonia in Adults, With Special Attention to the Role of Pneumococcus.Clin Infect Dis.(2017-Oct-30)