Pneumonia due to Legionella pneumophila is well described in the adult literature. The bacterium was first isolated after an outbreak of pneumonia at an American Legion convention in Philadelphia in 1976 and has been linked to earlier outbreaks of respiratory infections. Legionellosis more commonly occurs in patients with a compromised immune status or other underlying disease. Legionella has been associated with a broad spectrum of disease–from mild influenza-like symptoms (Pontiac fever) to severe cavitating pulmonary disease and death. Reports of legionellosis in children have been few, and most have occurred in neonates or highly immunocompromised children. We report 2 cases of legionellosis with cavitation in children who had no known underlying disease or immunodeficiency.

Patient and environmental specimens tested for legionella were referred to the Department of Microbiology at Good Samaritan Regional Medical Center (Phoenix, AZ). Patient specimens were inoculated on buffered charcoal yeast extract (BCYE)...

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