is bacillus gram positive or gram negative
1 Gram-negative cocciâ Neisseria meningitidis causes meningitis while Neisseria gonorrhoeae causes the sexually transmitted disease gonorrhea. 2  Gram-positive bacilliâ Bacillus anthracis (anthrax) can cause skin infections or pneumonia (also a bioterrorism agent); Listeria monocytogenes can cause foodborne illnesses.