Bacterial or Nonbacterial Pneumonia: Accuracy of Radiographic Diagnosis

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Abstract
Initial chest radiographs of 31 patients with laboratory-proved pneumonia were evaluated by a panel of 6 radiologists who had no prior knowledge of the clinical data. No statistical reliability was found for distinguishing bacterial from nonbacterial pneumonia. Radiographic diagnoses were 67% accurate for 16 cases of bacterial pneumonia and 65% accurate for 9 viral cases. Six cases of Mycoplasma pneumonia were diagnosed as nonbacterial 19% of the time and as bacterial pneumonia 81% of the time.

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