Staphylococcus capitis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Staphylococcus, Staphylococcus capitis  Kloos
and Schleifer 1975.
Staphylococcus capitis subsp. capitis  Kloos and Schleifer 1975,
Staphylococcus capitis subsp. urealyticus  Bannerman and Kloos 1991.
Gram positive cocci, 0.5 - 1.2 μm, nonmotile, nonspore-forming, singly or grouped
in pairs and clusters.
Colonies are smooth, slightly convex, glistening, opaque, and white or grayish
white; after storage in the cold (4–10 ºC). Some strains become yellowish or yellow-
orange. Colony diameter is  1–3 mm (subsp. capitis) or  4.3–7.1mm ( subsp.
urealyticus). Facultatively anaerobic,  37 ºC. Grows best under aerobic conditions.
Other media: Nutrient agar or nutrient broth, Trypticase Soy Agar ± 5% sheep blood,
Mueller Hinton agar, Chapman (selective medium with 75 g/l de NaCl & mannitol).
Isolated from human & animal skin; widely distributed in nature.
Sensible to novobiocin.
- skin surface commensal of man and animals;
- some endocarditis reports, septicemia to neonates;
- nosocomial infections (rarely).
  1. Holt J.G., Krieg N.R., Sneath P.H.A., Staley J.T., Wiliams S.T., 1994. Bergey's Manual of Determinative Bacteriology, Ninth Edition,
    Williams & Wilkins, Baltimore. Group 17, Gram-Positive Cocci, 527-558.
  2. Kloos W.E. & Schleifer K.H.: Isolation and characterization of staphylococci from human skin. II. Description of four new species:
    Staphylococcus warneri, Staphylococcus capitis, Staphylococcus hominis, and Staphylococcus simulans. International Journal of
    Systematic Bacteriology, 1975, 25, 62-79.
  3. Bannerman T.L. & Kloos W.E.: Staphylococcus capitis subsp. ureolyticus (sic) subsp. nov. from human skin. Int. J. Syst. Bacteriol.,
    1991, 41, 144-147.
  4. Karl-Heinz Schleifer and Julia A. Bell, 2009. Family VIII. Staphylococcaceae fam. nov.. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R.
    Krieg, W. Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The
    Firmicutes, Springer, 392-426.
Coagulase negative. See tables for differential characters.
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Hemolysis
Colony > 5mm
Pigment
Aerobic growth
Anaerobic growth
Nitrates reduction
Subsp. capitis
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Subsp. urealyticus
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Urease
Growth on
10% NaCl
Growth on
15% NaCl
Growth at
15 ºC
Growth at
45 ºC
Oxidase
FDP-aldolase
Class 1
FDP-aldolase
Class 2
Acetoin
production
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Growth on
(NH
4)2SO4.
Coagulase
Clumping factor
Arginine
dihydrolase
DNase
Heat-stable
nuclease
Beta-
glucosidase
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Lactose
Trehalose
Mannitol
Xylitol
Fructose
Raffinose
Sucrose
Xylose
Mannose
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Alkaline
phosphatase
Arabinose
Cellobiose
Salicin
Galactose
Melezitose
Turanose
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