Brevibacillus brevis (formerly known as Bacillus brevis) is a Gram-positive, aerobic, motile, spore-forming, rod-shaped bacterium commonly found in soil, air, water, and decaying matter. It is rarely associated with infectious diseases.Pearce, Paul. "Laboratory Evaluation of Endoscope Water Bottles." EndoNurse. 2005. 17 Jun 2006 <Laboratory Evaluation of Endoscope Water Bottles>. The antibiotics gramicidin and tyrocidine were first isolated from it.Abedon, Stephen. "Bacteria Binomials." 26 Apr 1998. Ohio State University. 17 Jun 2006 <http://www.mansfield.ohio-state.edu/~sabedon/biol4045.htm> .
Brevibacillus brevis is catalase positive, amylase negative, casein negative, gelatinase positive, and indole negative; most strains are citrate users. Some strains are capable of oxidizing carbon monoxide aerobically. Optimal growth occurs at 35 °C to 55 °C.
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