Legionnaires' Disease

Paul G. Auwaerter, M.D.

PATHOGENS

Major human Legionella pathogens:
- Legionella pneumophila serogroup 1, estimated 70-80% of cases
- Legionella micdadei, second most common in U.S.
- Legionella pneumophila other serogroups, 2-6% of cases
Other Legionella species are seen occasionally (see module for details).

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