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Janthinobacterium lividum : ウィキペディア英語版 | Janthinobacterium lividum
''Janthinobacterium lividum'' is an aerobic, gram-negative, soil-dwelling bacterium that has a distinctive dark-violet (almost black) color. This color is due to a compound called violacein, which is produced when glycerol is metabolized as a carbon source. Violacein has anti-bacterial, anti-viral, and anti-fungal properties. Its anti-fungal properties are of particular interest since ''J. lividum'' is found on the skin of certain amphibians, including the red-backed salamander (''Plethodon cinereus''), where it prevents infection by the devastating chytrid fungus (''Batrachochytrium dendrobatidis'').〔(Small Things Considered: What You Don't Know About ''Janthinobacterium'' )〕 ==Etymology== The genus name, ''Janthinobacterium'', comes from Latin ''janthinus'', which means "violet" or "violet-blue" + ''bacterium'', which means rod or staff.〔http://www.bacterio.cict.fr/ijk/janthinobacterium.html〕 The species name is also from Latin, ''lividum'', which means "of a blue or leaden color".〔''Ibid''.〕
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