PATHOGENESIS OF BRONCHITIS, IN INFANTS AND CHILDREN.Read in the Section on Diseases of Children at the Forty-fourth Annual Meeting of the American Medical Association.

The doctrine that bronchitis is the result of exposure to cold and moisture, is so generally accepted, that it is rather uncommon to lay stress upon the other factors which lead to it. And yet a consideration of the subject leads to the belief that these other factors are perhaps the more important and the more frequent causes.

Your attention is therefore invited to a general consideration of the etiologic factors leading to bronchitis in infante and childhood.

Many of the exanthemata have bronchitis as a concurrent symptom. Especially is this true of measles and rötheln. Influenza and whooping cough must also be included in the list of acute infectious diseases which present this condition. It is customary to speak of the bronchitis accompanying these diseases as a specific bronchitis. The qualifying title is very proper, but the bronchitis does not differ in any way from the same condition induced by