Community acquired pneumonia
Common organisms

• Streptococcus pneumoniae (30%)

• Hemophilus influenzae (10%)

• Mycoplasma pneumoniae (10%) 

• Chlamydia pneumoniae (8%)

• influenza virus (7%)

• Legionella species (3%) 

• In up to 40% cases, no pathogen is identified

• gram negative Enterobacteriaceae (3%)

• Chlamydia psittaci (1%)

• Moraxella catarrhalis (0.5%)

• other pathogens (8-10%)