Common aspiration agents
Streptococcus pneumoniae
Klebsiella pneumoniae
Oral anaerobes
Common aerosol inhalation agents
M. tuberculosis viruses Mycoplasma pneumoniae Chlamydia pneumoniae fungi Legionella
Common hematogenous dissemination agents
Staphylococcus aureus
pneumo by agent: extracellular bacteria
lobar/consolidation pneumo
pneumo by agent: certain bacterial species
host-compromise pneumo
mycoplasma, chlamydia, viral, ureaplasma, legionella, pneumocystitis
atypical (interstitial) pneumo
closed pops
anerobes, M. tuberculosis, fungi, Nocardiae, Actinomyces
chronic pneumo
nodules or abscesses/cavitary lesions