Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus schlegelii Schenk and Aragno 1981.
It is unclear from phylogenetic studies as to whether this species still belongs to the genus Bacillus.
Gram-variable, motile rods, 0.6 x 2.5-5.0 µm. Produce terminal, spherical spores,
which swell the sporangia.
Colonies are cream, circular or spreading. Facultatively chemolithoautotrophic,
autotrophic with H2 + CO2 or CO. Aerobic. Termophilic, growth temperature 50-70 ºC
(optimum 70 ºC); pH 6-7 (optimum pH 7). Grow in 0-3% NaCl. Alantoin or urate are
not required for growth.
Isolated from lake sediment, geothermal soils and sugar factory sludge.
- 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.
Carbohydrates are not metabolized.
Positive results for oxidase (weak), catalase, nitrate reduction & hydrolysis of casein
Negative results for hydrolysis of urea, hydrolysis of gelatin, egg yolk reaction, hydrolysis of starch, Voges-Proskauer test, citrate
utilization, acid production from: L-arabinose, D-glucose, D-mannitol & D-xylose.
(c) Costin Stoica