neisseria meningitidis or meningococcus are gram-negative coccus bacteria that cause meningococcal meningitis

bacteria bacterial bacterium beanshaped biology brain central cocci coccus diplococci disease gonorrhoeae gramnegative health healthcare human illness infection inflammation magnification medical medicine meningitidis meningitis meningococcal meningococci meningococcus microbiology microorganism microscopic neisseria nervous pathogen pathogenic rendering science system unhealthy