Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Staphylococcus, Staphylococcus rostri Riesen
and Perreten 2010.
Gram-positive cocci, 0.5-1 μm in diameter, occuring singly, in pairs or in clusters. Non-
After 24 h incubation at 37 ºC, colonies reach 2 mm in diameter, are slightly convex,
smooth, glossy and opaque white and display alpha-haemolysis on sheep-blood
agar. CAMP test positive. Grows with 9 and 12% NaCl (w/v) and at 43 ºC, but not at 45
or 15 ºC. Facultatively anaerobic.
Isolated from the snouts of pigs in Switzerland. Susceptible to novobiocin and lysostaphin.
Undetermined. Isolated from the noses of healthy pigs.
- Andrea Riesen and Vincent Perreten. Staphylococcus rostri sp. nov., a haemolytic bacterium isolated from the noses of healthy
pigs. Int. J. Syst. Evol. Microbiol., 2010, 60, 2042-2047.
Positive results for alanine arylamidase, alkaline phosphatase, catalase, DNase,
nitrate reduction, pyrrolidonyl arylamidase, acid production from: D-fructose, D-glucose and sucrose.
Negative results for acetoin production, arginine arylamidase, coagulase, beta-galactosidase, beta-glucuronidase, ornithine
decarboxylase, oxidase, thermostable nucleases, urease, acid production from: D-arabinose, cellobiose, D-mannitol, D-mannose,
maltose, raffinose, D-ribose & turanose.
Variable results for aesculin hydrolysis (weak reaction), arginine dihydrolase, acid production from: lactose, trehalose and
(c) Costin Stoica