Where is bacilli in your body?

Answer 1

Your question is a little ambiguous but i will try to answer it. Are you referring to
bacillus as a generic term for a rod shaped bacterium? or bacillus as a taxonomic class? As a taxonomic class, they can be dangerous if found in the human body, so generally they would not be present. If you meant as a general term for rod-shaped bacterium than they would be found all over the body but mostly as part of the gut flora, in the small intestine and stomach and all over your skin.