Legionella pneumophila


Standard Precautions
Standard Precautions

General Information

First Line Treatment

  • Levofloxacin

  • Azithromycin
    +/- Rifampin

Alternate Treatment

  • Clarithromycin

  • Doxycycline

    any of these three +/- Rifampin

Pathogen information

Aerobic small gram negative bacillus


Reservoir is water- aerosolization by cooling towers, spas, shower heads, etc.

Occurs in outbreaks

Person-to-person transmission not documented.

Associated syndromes

Pneumonia (Legionnaires disease)

Pontiac fever is a self-limited febrile illness

Extrapulmonary infections rare, but include endocarditis

Additional Information

Reportable disease - notify Public Health

Risk factors include outbreak setting, older male, smoker, with cardiopulmonary disease, renal disease, or immunosuppression