A Case of Severe Legionella Pneumonia in an Immunocompromised Traveler.

Legionnaires' disease is a severe pneumonia caused by Legionella species, typically acquired through inhalation of contaminated aerosols. Travel-associated cases pose a significant public health concern, particularly in resort settings where complex water systems may harbor the bacteria. We present the case of an immunocompromised 72-year-old woman who developed Legionnaires' disease following a stay at a resort in Jamaica. Environmental investigations confirmed Legionella contamination in the resort's water supply, highlighting the need for stringent water management practices in recreational facilities. This case underscores the importance of considering Legionnaires' disease in patients with pneumonia and recent travel to high-risk environments. Early recognition and prompt treatment are crucial in reducing morbidity and mortality. Additionally, routine water testing and maintenance of resort water systems are essential preventive measures. Clinicians play a key role in identifying and reporting cases to facilitate timely public health interventions and outbreak prevention.