Largest pathogenic Bacillus organism is -: (A) Bacillum subtilis, (B) Bacillum cereus, (C) Bacillum anthrocis, (D) Bacillum megaterism
Answer is C. The anthrax bacillus is one of the largest of pathogenic bacteria measuring 3-10 x 1-16 um. It resembles a Bamboo stick appearance Ref: Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no 244