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Serratia
''Serratia'' is a genus of Gram-negative, facultatively anaerobic, rod-shaped bacteria of the Enterobacteriaceae family. The most common species in the genus, ''S. marcescens'', is normally the only pathogen and usually causes nosocomial infections. However, rare strains of ''S. plymuthica'', ''S. liquefaciens'', ''S. rubidaea'', and ''S. odoriferae'' have caused diseases through infection. Members of this genus produce characteristic red pigment, prodigiosin, and can be distinguished from other members of the Enterobacteriaceae family by their unique production of three enzymes: DNase, lipase, and gelatinase.
==Infection of humans==
In the hospital, ''Serratia'' species tend to colonize the respiratory and urinary tracts, rather than the gastrointestinal tract, in adults. ''Serratia'' infection is responsible for about 2% of nosocomial infections of the bloodstream, lower respiratory tract, urinary tract, surgical wounds, and skin and soft tissues in adult patients. Outbreaks of ''S. marcescens'' meningitis, wound infections, and arthritis have occurred in pediatric wards. 〔Health Canada. MSDS - Infectious Substances. Serratia. (http://www.phac-aspc.gc.ca/lab-bio/res/psds-ftss/msds138e-eng.php) Accessed 7 July 2011.〕
Cases of ''Serratia'' arthritis have been reported in outpatients receiving intra-articular injections.
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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