Serratia marcescens

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Serratia marcescens
Scientific classification
Kingdom:Bacteria
Phylum:Proteobacteria
Class:Gamma Proteobacteria
Order:Enterobacteriales
Family:Enterobacteriaceae
Genus:Serratia
Species:S. marcescens
Binomial name
Serratia marcescens

Serratia marcescens is a Gram negative bacterium, a human pathogen of the family Enterobacteriaceae. It is involved in nosocomial infections, particularly urinary tract infections and wound infections.

Most strains are resistant to several antibiotics because of the presence of R-factors on plasmids.

In the 1950s it was erroneously believed to be non-pathogenic and its reddish coloration was used in school experiments to track infections.

Because of its red pigmentation, and its ability to grow on bread, it has been evoked as a naturalistic explanation of Medieval accounts of the "miraculous" appearance of blood on the eucharist.

The first indications of problems with the influenza vaccine produced by Chiron Corporation in 2004 involved S. marcescens contamination. [1] (http://chiron.com/041008_testimony.pdf)

S. Marcescens can cause conjunctivitis, keratitis, endophthalmitis, and tear duct infections. It is not uncommon in the respiratory and urinal tracts of adults and the gastrointestinal system of children. [2] (http://webeye.ophth.uiowa.edu/eyeforum/case34-setoninfection.htm)

It is a rod shaped, motile organism and can grow in temperatures ranging from 5 - 40 degrees Celsius. It can grow in pH levels ranging from 5 to 9. [3] (http://soils1.cses.vt.edu/ch/biol_4684/Microbes/Serratia.html)de:Serratia marcescens

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