Reservoir is water- aerosolization by cooling towers, spas, shower heads, etc.
Occurs in outbreaks
Person-to-person transmission not documented.
Pneumonia (Legionnaires disease)
Pontiac fever is a self-limited febrile illness
Extrapulmonary infections rare, but include endocarditis
Notifiable disease - notify Public Health ASAP and consult ID
Urine legionella antigen test available at EORLA
Risk factors include renal disease, or immunosuppression
