Table 1.

Community-acquired pneumonia: spectrum of common pathogens. (Modified from [3])

	Patient previously well and/or <65 years old	Co-morbid Illness and/or >65 years old
Organisms	Streptococcus pneumoniae	Streptococcus pneumoniae
	Mycoplasma pneumoniae	Haemophilus influenzae
	Chlamydia pneumoniae	Oral anaerobes
	Haemophilus influenzae	Gram-negative rods
	Viruses	Staphylococcus aureus
		Legionella species