In a study of infections with the fusiform bacillus and spirochetes, an exceedingly important group were the lesions in the lungs in which these micro-organisms were found. The following report is the result of a combined clinical and pathologic study of thirty-seven cases of fusospirochete pulmonary infections. It is hoped that this study will clarify certain hitherto obscure pulmonary infections, particularly those characterized by abscess formation and gangrene, and establish these infections as a definite clinical entity, comparable to the pneumonic processes caused by the pneumococcus, streptococcus and tubercle bacillus. In previous studies1 the association of fusiform bacilli and spirochetes in putrid and gangrenous lesions of the body was emphasized, particularly in connection with such processes about the teeth, tonsils, middle ear, lungs and genitalia. At that time it was pointed out that these organisms were important etiologic agents in certain types of pulmonary lesions, characterized by necrosis and foul
PILOT I, DAVIS DJ. STUDIES IN FUSIFORM BACILLI AND SPIROCHETES: IX. THEIR RÔLE IN PULMONARY ABSCESS, GANGRENE AND BRONCHIECTASIS. Arch Intern Med (Chic). 1924;34(3):313–354. doi:10.1001/archinte.1924.00120030048006
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