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 is 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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