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Edwardsiella tarda
''Edwardsiella tarda'' is a member of the ''Enterobacteriaceae'' family. The bacterium is a facultatively anaerobic, small, motile, gram negative, straight rod with flagella.〔〔 Infection causes Edwardsiella septicemia (also known as ES, edwardsiellosis, emphysematous putrefactive disease of catfish, fish gangrene, and red disease) in channel fish, eels, and flounder. ''Edwardsiella tarda'' is also found in largemouth bass and freshwater species such as rainbow trout.〔 It is a zoonosis and can infect a variety of animals including fish, amphibians, reptiles and mammals. ''Edwardsiella tarda'' has also been the cause of periodic infections for various animals within zoos.〔 ''E. tarda'' has a worldwide distribution and can be found in pond water, mud, and the intestine of fish and other marine animals.〔 It is spread by carrier animal feces.
==History==
The creation of the species was suggested by Ewing and colleagues in 1965 in order to cover 37 different strains that mainly were found in fecal materials. Japanese and other scientists were also observing similar bacterium to these and eventually the bacterium were divided into two groups called the Asakusa and Bartholomew groups. ''Edwardsiella tarda'' was established as a legitimate genus and species through studies at the Walter Reed Army Institute of Research by Don Brenner. The ''Edwardsiella'' genus was named after P. R. Edwards in 1965.〔
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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