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In croupous pneumonia we have, I believe, a special and independent affection. Its frequent occurrence, especially during our winter and spring months, affords abundant opportunity for observing it in all its phases. And though these seasons have an undoubted influence upon its prevalence, yet from the tables of mortality we find it also occurs in the milder seasons and in every degree of latitude, wherever rapid changes of temperature with stormy winds take place, particularly with moisture. But in a climate similar to ours this is usually the exception. For it rarely makes its appearance before the colder seasons approach. But while we are conscious of the undoubted fact that these cold, moist seasons have a great bearing toward developing and spreading this affection, there are other important influences at work, which play a part in the inherent qualities of increasing its development, and these are chiefly intemperance of every
CAMPBELL DS. MANAGEMENT AND TREATMENT OF CROUPOUS PNEUMONIA.. JAMA. 1897;XXIX(3):103-108. doi:10.1001/jama.1897.02440290009001e