Infectious Agents Associated with Cylindrical Bronchiectasis.

rather frequent complication of bronchopneumonias occurring in Naval recruits at the Great Lakes Naval Training Center. In 1962, 137 cases of cylindrical bronchiectasis were treated at the Naval Hospital, which represents an incidence of bronchopneumonia complications of 4.5 per cent. The factors involved in the pathogenesis of bronchiectasis are complex. The host, the infectious agent, and the environmental setting of their encounter, play a role. It is well-recognized, however, that the sequence of events leading to bronchiectasis is initiated by an infectious process, resulting in inflammation, obstruction and finally destructive changes in the bronchus.’ The present study was limited to identification of the infectious agents associated with cylindrical bronchiectasis. Both isolation from specimens obtained by bronchoscopv and immunologic studies on serum samples were employed.