Long-term followup of two patients with pulmonary cavitation caused by Legionella pneumophila.

Two patients with cavitary pneumonia caused by Legionella pneumophila were followed by several months. Both patients had positive sputum cultures for L. pneumophila; one patient had positive respiratory tract cultures for 18 days after initiation of erythromycin. Slow resolution of the cavities occurred in both patients after 1 to 2 months of antimicrobial therapy.