Bacillus subtilis is readily present everywhere; the air, soil and in plant compost. It is predicted that it spends most of it time inactive and in spore form. When the bacterium is active though, it produces many enzymes. One enzyme contributes to the plant degradation process. Bacillus subtilis can also be found in the human body, mostly on the skin or in the intestinal tract. However it is very rare for this bacterium to colonize on the human body.