Table 4.

Bacteria that can cause pneumonia9, 14

Bacteria	Disease
Chlamydia trachomatis	Community‐acquired pneumonia (in neonates)
Pneumocystis jiroveci	Community‐acquired pneumonia (in infants)
Mycoplasma pneumoniae,Chlamydia pneumoniaea	Community‐acquired pneumonia (in school‐age children)
S. pneumoniae, H. influenzae type b, Staphylococcus aureus, Legionella spp., Acinetobacter spp., M. catarrhalis,C. pneumoniae, Meningococci	Community‐acquired pneumonia (in adults)
Pseudomonas aeruginosa,Enterobacter spp., Klebsiella spp., other Enterobacteriaceae,methicillin‐resistant S. aureus, Acinetobacter spp., S. pneumoniae, anaerobes, Legionella spp., H. influenzae	Hospital‐, ventilation‐ and healthcare‐associated pneumonia
Mycobacterium tuberculosis	Pneumonia in patients with compromised immune system