bacteria neisseria meningitidis

neisseria meningitidis bacteria bacterium disease microbiology meningitis meningococcal bacterial meningococcus pathogenic gramnegative pathogen 3d illustration healthcare illness magnification health model surface objects biology unhealthy beanshaped shape diplococci two cocci spherical meningococcemia sepsis septicemia nasopharyngitis vaccine medicine medical science scientific research microbe microorganism bacteriology pilli pillus