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gammaproteobacteria
Gammaproteobacteria are a class of several medically, ecologically, and scientifically important groups of bacteria. An exceeding number of important pathogens belongs to this class. Like all Proteobacteria, the Gammaproteobacteria are Gram-negative.
==Significance==
The Gammaproteobacteria comprise several medically and scientifically important groups of bacteria, such as the Enterobacteriaceae, Vibrionaceae and Pseudomonadaceae. A number of important pathogens belongs to this class, e.g. ''Salmonella'' spp. (enteritis and typhoid fever), ''Yersinia pestis'' (plague), ''Vibrio cholerae'' (cholera), ''Pseudomonas aeruginosa'' (lung infections in hospitalized or cystic fibrosis patients), and ''Escherichia coli'' (food poisoning). Important plant pathogens such as ''Xanthomonas axonopodis'' pv. ''citri'' (citrus canker) and ''Pseudomonas syringae'' pv. ''actinidiae'' (kiwifruit Psa outbreak) are also Gammaproteobacteria. Members of Chromatium are photosynthetic and oxidize hydrogen sulfide instead of water, producing sulfur as excrement. Some Gammaproteobacteria are methane oxidizers, and many of them are in symbiosis with geothermic ocean vent dwelling animals.〔http://comenius.susqu.edu/biol/202/EUBACTERIA/PROTEOBACTERIAE/gammaproteobacteria-frame.htm〕
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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