Definitions for bacillus subtilis

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Princeton's WordNet

  1. Bacillus subtilis, Bacillus globigii, grass bacillus, hay bacillus(noun)

    a species of bacillus found in soil and decomposing organic matter; some strains produce antibiotics

Freebase

  1. Bacillus subtilis

    Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a Gram-positive, catalase-positive bacterium. A member of the genus Bacillus, B. subtilis is rod-shaped, and has the ability to form a tough, protective endospore, allowing the organism to tolerate extreme environmental conditions. Unlike several other well-known species, B. subtilis has historically been classified as an obligate aerobe, though recent research has demonstrated that this is not strictly correct. Although this species is commonly found in soil, more evidence suggests that B. subtilis is a normal gut commensal in humans. A 2009 study compared the density of spores found in soil to that found in human feces. The number of spores found in the human gut is too high to be attributed solely to consumption through food contamination. Soil simply serves as a reservoir, suggesting that B. subtilis inhabits the gut and should be considered as a normal gut commensal.

U.S. National Library of Medicine

  1. Bacillus subtilis

    A species of gram-positive bacteria that is a common soil and water saprophyte.

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