Osmosis video - Neisseria meningitidis

Neisseria meningitidis also known as meningococcus, is a gram-negative diplococcus, non-spore-forming, both oxidase and catalase positive, which is commonly known to cause meningitis. Meningitis is an infection of the membranes called meninges that surrounds the brain and spinal cord.

When meningococcal bacteria enters the bloodstream, it's referred to as meningococcemia. Meningitis most commonly results from meningococcemia and is associated with outbreaks, especially in unvaccinated people living in crowded settings, like dormitories, military barracks, and schools.

Symptoms of meningococcal meningitis include fever, headache, stiff neck, and a rash. Other symptoms may include nausea, vomiting, sensitivity to light, and altered mental status. Meningitis can progress rapidly and can be fatal if not treated promptly with antibiotics.