Abstract
THE STANDPOINT OF THE INTERNIST. DR. THOMAS MCCRAE. It is essential to have the cooperation of men in the various departments of medical science in order that a comprehensive grasp of this subject may be had. From the standpoint of medicine, it is well to go back and consider infections of the lower respiratory tract other than tuberculosis. This knowledge was gained gradually, and the development from the otolaryngologic standpoint was also slow. Inhalation must play a part; drainage plays a large part; lymphatic transmission has its importance, and blood transmission is responsible for a very small amount. The changes in the lower respiratory tract due to infection from above are: bronchial infection, and later, lymphatic infection. The infection is acute at first, and there are periods of freedom. With more exacerbations fibrosis occurs in most cases after some years but occasionally developing rapidly. Cough results in emphysema, which increases
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