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Staphylococcus epidermidis - Wikipedia, the free encyclopedia


** /Staphylococcus epidermidis/ **

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/Staphylococcus epidermidis/
Staphylococcus epidermidis 01.png
Scanning electron image of /S. epidermidis/.
Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Bacilli
Order: Bacillales
Family: Staphylococcaceae
Genus: /Staphylococcus/
Species: /*S. epidermidis*/
Binomial name
*/Staphylococcus epidermidis/*
(Winslow & Winslow 1908)
Evans 1916
/Staphylococcus albus/ Rosenbach 1884

/*Staphylococcus epidermidis*/ is a Gram-positive bacterium, and one of
over 40 species belonging to the genus /Staphylococcus/.^[1] It is part of
the normal human flora, typically the skin flora, and less commonly the
mucosal flora.^[2] Although /S. epidermidis/ is not usually pathogenic,
patients with compromised immune systems are at risk of developing
infection. These infections are generally hospital-acquired.^[3]/S.
epidermidis/ is a particular concern for people with catheters or other
surgical implants because it is known to form biofilms that grow on these
devices.^[4] Being part of the normal skin flora, /S. epidermidis/ is a
frequent contaminant of specimens sent to the diagnostic laboratory.^[5]


· 1 Discovery
· 2 Cellular morphology and biochemistry
· 3 Virulence and antibiotic resistance
· 4 Disease
· 5 Identification
· 6 See also
· 7 Notes and references


Friedrich Julius Rosenbach distinguished /S. epidermidis/ from /S. aureus/
in 1884, initially naming /S. epidermidis/ as /S. albus/.^[6] He chose
/aureus/ and /albus/ since the bacteria formed yellow and white colonies,

*Cellular morphology and biochemistry[edit]*

/Staphylococcus epidermidis/, 1000 magnification under bright field

/S. epidermidis/ is a very hardy microorganism, consisting of nonmotile,
Gram-positive cocci, arranged in grape-like clusters. It forms white,
raised, cohesive colonies about 1–2 mm in diameter after overnight
incubation, and is not hemolytic on blood agar.^[4] It is a
catalase-positive,^[7]coagulase-negative, facultative anaerobe that can
grow by aerobic


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