''Legionella dumoffii'' is a Gram-negative bacterium from the genus '' Legionella'' with a monopolar flagellum which was isolated from lung tissue of a patient who suffered from fatal pneumonia. ''L. dumoffii'' occurs in soil and freshwater environments and can cause human pneumonia and accidentally induce other diseases such as prosthetic valve endocarditis and septic arthritis. Journal of Bacteriologybr>
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