id author title date pages extension mime words sentences flesch summary cache txt cord-326751-fn43p19j Herold, Christian J. Community-acquired and nosocomial pneumonia 2004-01-29 .txt text/plain 8597 439 33 Moreover, the majority of patients suspected to have CAP are otherwise healthy individuals without abnormalities of the lungs that would render the identification of an infiltrate difficult; thus, one should think that the detection or exclusion of outpatient pneumonia is, in most cases, relatively straightforward. Particularly in multimorbid hospitalized patients, the identification of a pulmonary infiltrate and the diagnosis of pneumonia may be hampered by pre-existing or concomitant pulmonary disorders (Fig. 4) , or limited by processes that have a radiological appearance similar to that of pneumonia; these include atelectasis, edema, aspiration, hemorrhage, infarct, idiopathic interstitial pneumonias, pulmonary involvement in collagen-vascular disorders adult respiratory distress syndrome (ARDS), and pleural effusion. They demonstrated that (focal segmental or lobar) alveolar infiltrates were caused by bacterial agents in over 90% of cases, whereas the majority of diffuse interstitial or mixed abnormalities could be attributed to viral, atypical bacterial, or tuberculous infections (Figs. ./cache/cord-326751-fn43p19j.txt ./txt/cord-326751-fn43p19j.txt