Bacilli refers to a taxonomic class of bacteria. It includes two orders, Bacillales and Lactobacillales, which contain several well-known pathogens like Bacillus anthracis (the cause of anthrax). ==Ambiguity== There are several related concepts that make use of similar words, and the ambiguity can create considerable confusion. The term `Bacillus.... Found on http://en.wikipedia.org/wiki/Bacilli