Abstract
From the opening of the base hospital, Nov. 1, 1917, to May 31, 1918, 421 cases of pneumonia have been diagnosed in the wards. Of these, 361 were diagnosed as lobar pneumonia and sixty as bronchopneumonia. We are doubtful as to the accuracy of this differential diagnosis, and in some cases such a differentiation was impossible. Cases with sudden onset, usually with a chill, rusty sputum, continuous high fever, and defervescence by crises between the fourth and tenth day were called lobar pneumonia without consideration of the distribution of pulmonary signs. In a few borderline cases the roentgen ray was of considerable help. There were undoubtedly a number of cases of bronchopneumonia or interstitial bronchopneumonia diagnosed as lobar pneumonia, and we were unable to correct this diagnosis except when the cases terminated fatally. The bacteriology was no help in making the diagnosis, for in two cases of bronchopneumonia and five
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