Staphylococcus auricularis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Staphylococcus, Staphylococcus auricularis  
Kloos and Schleifer 1983.
Gram positive cocci, 0.8 - 1 μm, nonmotile, nonspore-forming.
Colony diameter 1.4–2.8 mm on P agar after incubation at 34–35 ºC for 3 days, then
25 ºC for 2 days. Aerobic. Temperature range for growth 20–45 ºC; optimum 30–40 ºC.
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, ears and mucous membranes; ubiquitous. Is susceptible to Novobiocin.
- surface commensal of man and animals
- some external otitis reports
- nosocomial infections
  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.: Staphylococcus auricularis sp. nov.: an inhabitant of the human external ear. Int. J. Syst. Bacteriol.,
    1983, 33, 9-14.
  3. 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.
Positive results for catalase, lipase, L-lactic acid production, acid production from:
glucose, glycerol, fructose & trehalose.

Negative results for alkaline phosphatase, urease, oxidase, coagulase, clumping
factor, DN-ase, beta-glucosidase, beta-glucuronidase, D-lactic acid production, acid
production from: mannose, lactose, mannitol, raffinose, xylose, urease, oxidase,
arabinose, cellobiose, fucose, salicin, galactose, melezitose & ribose.

Variable results for nitrate reduction, arginine dihydrolase, galactosidase, acetoin production, acid production from sucrose &
turanose.
(c) Costin Stoica
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