Legionella pneumophila is a thin, pleomorphic, flagellated Gram-negative bacterium of the genus Legionella. L. pneumophila is the primary human pathogen in this group and is the causative agent of legionellosis or Legionnaires' disease. L. pneumophila is non-acid-fast, non-sporulating, and morphologically a non-capsulated rod-like bacteria. Aerobic and unable to hydrolyse gelatin or produce urease, they are also non-fermentative. L. pneumophila is neither pigmented nor does it autofluoresce. It is oxidase- and...
in at least 25 important animal and plant pathogens including Erwinia, which causes plant rot; Legionella
pneumophila, which causes Legionnaires' disease; and Haemophilus influenzae, which causes lung