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Dialister pneumosintes
''Dialister pneumosintes'' (formerly named ''Bacteroides pneumosintes'') is a nonfermentative, anaerobic, gram-negative rod that grows with small, circular, transparent, shiny, smooth colonies on blood agar. ''D. pneumosintes'' has been recovered from deep periodontal pockets, but little is known about the relationship between the organism and destructive periodontal disease.
==History==
''B. pneumosintes'', originally described by Olitsky and Gates as ''Bacterium pneumosintes'' in 1921, was first isolated from nasopharyngeal secretions of patients with influenza during the epidemics of 1918 through 1921.〔 The species was later placed in the genus ''Dialister'' and subsequently transferred to the genus ''Bacteroides'' in 1970 (8).
During the 1980s, the genus Bacteroides underwent major taxonomic revisions, with many of the species being transferred to new genera. Shah and Collins in 1989 proposed that the genus Bacteroides be restricted to the saccharolytic, nonpigmented species of the Bacteroides fiagilis group. B. pneumosintes differs from this genus as defined by Shah and Collins, and its true taxonomic affiliations remained uncertain. On the basis of phenotypic criteria, Moore and Moore have recently resurrected the genus Dialister, to accommodate B. pneumosintes. Dialister is a genus of Firmicutes bacteria classified within the class Negativicutes.
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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