Bacillus subtilis (B. subtilis) - Definition of Bacillus subtilis (B. subtilis)

A (rod-shaped) aerobic bacterium commonly used as a host in recombinant DNA experiments.

Type species of the ubiquitous saprophytic aerobic Gram-positive spore-bearing bacilli which possess features similar to B. anthracis. B. subtilis is noted for the penicillinase potential of some strains.

A widespread bacterium found as a saprophyte in soil and water, frequently encountered as a contaminant in laboratory settings. This bacterium is known to sometimes cause conjunctivitis in humans. Notably, it is also recognized for its ability to produce the antibiotic bacitracin. This dual nature – being both a cause of infection and a source of a valuable antibiotic – highlights its significance in both medical and pharmaceutical contexts. The presence of this bacterium in various environments and its impact on human health make it an important subject of study and monitoring.