Spontaneous pneumothorax complicating Legionnaires' disease.

Introduction Pneumothorax as a complication of pneumonia is more likely to occur with those infections associated with cavitation and abscess formation. Presumably rupture of a pneumatocele or abscess into the pleural space is the mechanism of production of the pneumothorax. Organisms most commonly associated with this condition include Mycobacterium tuberculosis (Meyerson, 1948) and Staphylococcus aureus (Mills and Bruce, 1965).