Some patients are at greater risk of developing legionellosis than others.
Patient-related risk factors for legionellosis:
(1) cigarette smoking
(2) chronic lung disease (COPD, etc)
(3) corticosteroid therapy
(4) transplant recipients
(5) other causes of immunosuppression
Additional risk factors for hospital-acquired legionellosis:
(1) recent surgery
(2) Charlson Comorbidity Index >= 2
HIV infection was not associated with an increased risk but infections tended to be more severe (Stout and Yu).
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Specialty: Infectious Diseases, Pulmonology
