Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus clarkii Nielsen, Fritze & Priest 1995.
Gram-positive rods, 0.6-0.7 x 2.0-5.0 µm. Subterminally, ellipsoidal endospores
(0.5-0.7 x 0.7-1.0 µm) in unswollen / swollen sporangia.
Colonies are smooth, creamy-white to yellow, circular, with entire margins. Strictly
alkaliphilic and moderately halophilic organism. Grow at ph 9-10 (optimum); no
growth at pH 5-7. NaCl is required for growth; grow in 5-16% NaCl media.
temperature range 15-45 ºC. Allantoin or urate are not required for growth.
Isolated from mud and soil.
Undetermined.
- N.A. Logan and P. De Vos, 2009. Genus I. Bacillus Cohn 1872. 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, 21-127.
Positive results for hydrolysis of hippurate, hydrolysis of gelatin, nitrate reduction,
hydrolysis of casein, hydrolysis of Tween 40 and Tween 60.
Negative results for hydrolysis of starch, hydrolysis of Tween 20 and Tween 80.
Strain didn't grow in Voges-Proskauer test and in tests for the acidification of: L-arabinose , D-glucose, D-mannitol, D-mannose,
methyl beta-xyloside, glycerol, glycogen, salicin, starch and D-xylose.
Variable results for deamination of phenylalanine and hydrolysis of urea.
(c) Costin Stoica