Longest pathogenic Bacillus species is
Longest pathogenic Bacillus species is Bacillus anthracis (1.2 mm width and 3-5mm long). B. anthracis causes anthrax Largest known Bacillus species is B. megaterium, (1.5 mm width and 4 mm long).
Bacillus subtilis
Bacillus cereus
Bacillus anthracis
Bacillus megaterium
General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria)