During the past five years we have had the opportunity of observing in infants a form of respiratory disease the distinctive clinical and pathologic features of which constitute in our opinion a definite entity.
American and English textbooks on pediatrics have given no serious consideration to the clinical and pathologic picture to be described and discussed here. Did we not know from our own work that it is seen rather frequently in the United States, we might imagine that it was peculiar to the continent of Europe, and particularly to Germany where excellent descriptions have appeared in several different textbooks. In 1906 Heubner1 presented the subject in detail, both from the clinical and from the pathologic standpoint, in his usual clear and convincing manner. Strümpel2 and Pirquet3 also described the picture. However, even from the presentations of these authors one does not receive the impression that the