[ Note: The distance between cities in Nevada (US) distance chart below is straight line distance (may be called as flying or air distance) between the two locations in Nevada (US) calculated based on their latitudes and longitudes. This distance may be very much different from the actual travel distance.].
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.
Gram-positive bacteria do not have an outer cell membrane found in Gram-negative bacteria. The cell wall of Gram-positive bacteria is high in peptidoglycan which is responsible for retaining the crystal violet dye. Gram-positive and negative bacteria are chiefly differentiated by their cell wall structure.