Definition of community acquired pneumonia:
(1) admission from home or nursing home
(2) presence of a new pulmonary infiltrate on chest X-ray
(3) acute onset of at least one major or two minor findings
(3a) major: cough, sputum production, fever
(3b) minor: dyspnea, pleuritic chest pain, altered mental state, pulmonary consolidation on physical examination, total leukocyte count > 12,000 per µL
Aspiration pneumonia should be considered in patients with:
(1) altered mental status
(2) abnormal gag reflex, and
(3) X-ray infiltrates in
(3a) the superior or basilar segments of the lower lobes, OR
(3b) the posterior segment of the upper lobe
