Fulová M, Kotrbancová M, Bražinová A, et al. - In the present study, the researchers sought to analyze 5 Legionnaires’ disease (LD) cases in a children’s hospital in Slovakia, subsequent environmental investigation, control measures, and 5-year monitoring of Legionella colonization in hospital’s water system. From 2014 to 2019, clinical specimens were tested from 75 hospitalized patients. Respiratory samples were cultured for Legionella, the urine of the patient was tested for Legionella urinary antigens, and the microagglutination test was used for serologic testing. In 2014–2015, 5 Legionella infections were identified. The median age was 15 years for patients. Control measures have resulted in a lower risk of infection but not the eradication of Legionellae. In hospitalized children with pneumonia, particularly in hospitals with colonized water system, diagnoses for Legionella infection need to be expanded.