(c) Costin Stoica
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Staphylococcaceae, Genus Salinicoccus, Salinicoccus qingdaonensis Qu
et al. 2012.
Gram-positive cocci, 0.4-0.6 μm in diameter, occuring singly, in pairs, tetrads or
clumps. Non-motile. Non-spore-forming. Capsule is present.
Colonies are white, circular, smooth and convex, 1-2 mm in diameter after 3 days of
incubation at 28 ºC on Marine Agar, with no diffusible pigment production. Strictly
aerobic. Moderately halophilic; Growth occurs in media containing 0-25% NaCl;
optimum 3% NaCl. Grows at 16-42 ºC; optimal growth at 28 ºC. Grows in pH 6.0-10.5;
optimum pH 8.5.
Isolated from a seawater sample collected from coastal seawater of Qingdao, east China, during a bloom of the green alga
Susceptible to midecamycin (30 μg), ofloxacin (5 μg), ciprofloxacin (5 μg), vancomycin (30 μg), furazolidone (300 μg), chloromycetin (30
μg), clindamycin (2 μg), cefobid (30 μg), amikacin (30 μg), vibramycin (30 μg), minocycline (30 μg), erythromycin (15 μg), penicillin (10
μg), oxacillin (1 μg), ampicillin (10 μg), carbenicillin (100 μg), piperacillin (100 μg), cephalothin IV (30 μg), cephalothin V (30 μg),
cephalothin VI (30 μg) & rocephin (30 μg).
Resistant to norfloxacin (10 μg), polymyxin B (100 U), compound sulfamethoxazole (75 μg), gentamicin (10 μg), kanamycin (30 μg),
neomycin (10 μg), tetracycline (30 μg) and fortum (30 μg).
Description is based on API 20E, API 20NE, API 50CH (with API 50 CH B/E medium),
API ZYM, Biolog GP and GN results.
Positive results for aesculin hydrolysis, catalase, nitrate reduction, oxidase,Tween 80 hydrolysis, Voges-Proskauer test, acid
production from: D-fructose, D-glucose, glycerol, N-acetylglucosamine, potassium 5-ketogluconate & trehalose.
Negative results for acid phosphatase, alkaline phosphatase, arginine dihydrolase, arginine decarboxylase, beta-alanine
arylamidase, alpha-chymotrypsin, casein hydrolysis, chitin hydrolysis, cystine aminopeptidase, esterase (C4), esterase lipase (C8),
alpha-fucosidase, alpha- and beta-galactosidase, alpha- and beta-glucosidase, beta-glucuronidase, gelatin liquefaction,
gamma-glutamyltransferase, H2S production, indole production, lipase (C14), lysine decarboxylase, alpha-mannosidase, methyl red
test, N-acetyl-beta-galactosaminidase, N-acetyl-beta-glucosaminidase, ornithine decarboxylase, starch hydrolysis, Tween 20
hydrolysis, trypsin, tyrosine arylamidase, tryptophan deaminase, urease, valine aminopeptidase, beta-xylosidase, acid production
from: D-galactose, maltose, D-mannitol & sucrose.
- Qu(Z.), Li (Z.), Zhang (X.) and Zhang (X.H.): Salinicoccus qingdaonensis sp. nov., isolated from coastal seawater during a bloom of
green algae. Int. J. Syst. Evol. Microbiol., 2012, 62, 545-549.