Staphylococcus sciuri Gram-stained cells
Staphylococcus sciuri colonies on sheep blood agar
Staphylococcus sciuri
Cultural characteristics
Biochemical characters
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Staphylococcus,
- Staphylococcus sciuri subsp. carnaticus  Kloos et al. 1997
- Staphylococcus sciuri subsp. lentus  Kloos et al. 1976 - moved to  Staphylococcus lentus,  Schleifer et al. 1983
- Staphylococcus sciuri subsp. rodentium  Kloos et al. 1997
- Staphylococcus sciuri subsp. sciuri  Kloos et al. 1976.

Subspecies ‘sciuri’, ‘carnaticus’ and ‘rodentium’ were created by ribotype delineation.
Gram positive cocci, 0.7-1.2 μm diameter, nonmotile, nonsporing, occuring singly and
forming pairs and tetrads.
Colonies are circular, S-type, yellowish-gray. Facultatively anaerobic, 37 ºC (also
grows at 15 ºC). Grow better under aerobic conditions. Some strains do not grow in
the anaerobic zone of thioglycolate medium. No growth or poor growth at 45 ºC. Grow
on media: Trypticase Soy Yeast extract Agar ± 5% sheep blood, Trypticase Soy Yeast
extract  Broth, Nutrient agar, P agar.
Isolated from soil, water, sand, animal skin (eastern gray squirrel - Sciurus
, opossum, dog, cattle) and human clinical samples (urine). Also isolated
from cow milk (admin note).
Can grow in habitats containing only an inorganic nitrogen source and thus might be
more free-living than other staphylococci. Novobiocin and lysozyme resistant.
Urinary tract infection (one report), endocarditis, peritonitis, septic shock, and wound infections in humans. Doubtful pathogenicity.
S. sciuri was frequently present as a part of skin, nasal and oral flora in healthy dogs and bovines.
  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., Ballard D.N., Webster J.A., Hubner R.J., Tomasz A., Couto I., Sloan G.L., Dehart H.P., Fiedler F., Schubert K., De
    Lencastre H., Santos SanchesS (I.), Heath H.E., Leblanc P.A. & Ljungh A.: Ribotype delineation and description of Staphylococcus
    sciuri subspecies and their potential as reservoirs of methicillin resistance and staphylolytic enzyme genes. Int. J. Syst. Bacteriol.,
    1997, 47, 313-323.
  3. KloosW.E., Schleifer K.H. & Smith R.F.: Characterization of Staphylococcus sciuri sp. nov. and its subspecies. International
    Journal of Systematic Bacteriology, 1976, 26, 22-37.
  4. Srdjan Stepanovic, Petr Ježek,  Dragana Vukovic, Ivana Dakic,  & Petr Petrás: Isolation of Members of the Staphylococcus sciuri
    Group from Urine and Their Relationship to Urinary Tract Infections. J Clin Microbiol. 2003 November; 41(11): 5262–5264.
  5. White D.G., Harmon R.J., Matos J.E.S. & Langlois B.E.: Isolation and Identification of Coagulase-Negative Staphylococcus
    Species from Bovine Body Sites and Streak Canals of Nulliparous Heifers. Department of Animal Sciences, University of Kentucky
    Lexington 40546-0215.
  6. 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 nitrate reduction, deoxyribonuclease, benzidine test, oxidase,
beta-glucosidase, catalase, acid production from: trehalose, mannitol, sucrose,
cellobiose, fucose, glucose (many strains only ferment glucose weakly), glycerol,
galactose, dulcitol, meso-erythritol, D-erythrose, D-lyxose, L-sorbose, and tagatose.

Negative results for urease, coagulase-rabbit plasma, clumping factor,
beta-glucuronidase, beta-galactosidase, elastase, lipase, acetoin production
(Voges-Proskauer), arginine dihydrolase, acid production from: raffinose, turanose,
and xylitol.

Variable results for alkaline phosphatase, acid production from L-arabinose, lactose,
maltose, D-mannose, D-melezitose, rhamnose, salicin, D-sorbitol, and D-xylose.

S. sciuri subsp. carnaticus could be distinguished by its ability to produce acid
aerobically from D-xylose and maltose, inability to produce acid from D-melezitose.
S. sciuri subsp. rodentium could be distinguished by its positive reaction for clumping
factor and/or protein A .
(c) Costin Stoica
Culture media
Biochemical tests
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