Staphylococcus warneri
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Staphylococcus, Staphylococcus warneri  Kloos
and Schleifer 1975.
Gram-positive cocci, 0.5–1.2 μm in diameter, nonmotile, nonsporing. Occur singly or
grouped in pairs or tetrads.
Colonies are gray-white (yellowish after 24h) and about 2-4 mm in diameter after 48
hours of incubation,
may have a yellow-orange rim or a yellowish center. Facultatively
anaerobic, optimum temperature 30-40 ºC (range 15-45 ºC). Grow better aerobically.
Grow on media: Trypticase Soy Agar ± 5% sheep blood, Chapman, P agar.
Isolated from human & animal skin. Sensible to Novobiocin. Resistant to lysozyme.
Usually is a commensal organism on the skin of humans and animals. May produce bacteremia & endocarditis due to prosthetic
devices contamination in humans.
Has been associated with mastitis in cattle. Possible cause of bovine abortion. Canine meningoencephalitis (1 report).
  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. U. Kamath, C. Singer, and H. D. Isenberg: Clinical significance of Staphylococcus warneri bacteremia. J Clin Microbiol. 1992
    February; 30(2): 261–264.
  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.
Positive results for urease, acetoin production (Voges-Proskauer), beta-glucosidase,
lipase,  acid production from: fructose, glucose, glycerol, maltose (delayed), sucrose
& trehalose.

Negative results for nitrate reduction (weak positive), coagulase, oxidase, clumping
factor, caseinase, heat-stable nuclease, beta-galactosidase, alkaline phosphatase, gelatinase, ornithine decarboxylase, acid
production from: arabinose, cellobiose, dulcitol, erythritol, erythrose, fucose, gentiobiose, inositol, lyxose, mannose, melibiose,
raffinose, salicin, sorbitol, sorbose, tagatose, xylose & xylitol.

Variable results for arginine dihydrolase, DN-ase, beta-glucuronidase, acid production from: lactose, mannitol, raffinose, galactose,
melezitose, turanose & ribose.
(c) Costin Stoica
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