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legionella pneumophila
''Legionella pneumophila'' is a thin, aerobic, pleomorphic, flagellated, non-spore forming, Gram-negative bacterium of the genus ''Legionella''. ''L. pneumophila'' is the primary human pathogenic bacterium in this group and is the causative agent of Legionnaires' disease, also known as legionellosis.
==Characterization==
''L. pneumophila'' is a Gram-negative, nonencapsulated, aerobic bacillus with a single, polar flagellum often characterized as being a coccobacillus. It is aerobic and unable to hydrolyse gelatin or produce urease. It is also nonfermentative. ''L. pneumophila'' is neither pigmented nor does it autofluoresce. It is oxidase- and catalase-positive, and produces beta-lactamase. ''L. pneumophila'' colony morphology is gray-white with a textured, cut-glass appearance; it also requires cysteine and iron to thrive. It grows on yeast extract in "opal-like" colonies.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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