MENINGOCOCCAL MENINIGITIS. by Krysta Peterson. Meningococcal Meningitis is a potentially fatal bacterial infection caused by the organism Neisseria meningitidis (2) that results in the inflammation of the meninges of the spinal cord and brain in infected individuals (7).ENINGOCOCCAL MENINIGITIS. by Krysta Peterson. Meningococcal Meningitis is a potentially fatal bacterial infection caused by the organism Neisseria meningitidis (2) that results in the inflammation of the meninges of the spinal cord and brain in infected individuals (7).