Epidemic of Streptococcus Pneumonia and Empyema at Camp Dodge, Iowa

From Sept. 20, 1917, until May 10, 1918, 675 patients, whose cases were diagnosed as lobar pneumonia, have entered the base hospital at Camp Dodge, Iowa. This does not include a limited number of cases diagnosed clinically as bronchopneumonia. At necropsy, however, not infrequently it was found that, in reality, we were dealing with a confluent bronchopneumonia which was localized chiefly or entirely in a single lobe. Inasmuch, however, as these cases, if necropsy had not been performed, would have been placed on record as lobar pneumonia, they have been so considered in this discussion. Although measles was quite prevalent throughout the entire winter, pneumonia as a complication was very infrequent; only since about May 1 has pneumonia as a complication of measles reached any considerable number, and this period is not connected with the epidemic of streptococcus pneumonia, which at the time mentioned was on the wane. The ordinary