Neisseria meningitidis

Neisseria meningitidis


Droplet / Contact Precautions


General Information

Encapsulated Gram-negative diplococci.

Normal flora. Humans are the reservoir. Generally of little significance when cultured from nonsterile sites such as oropharynx.

Quadrivalent vaccine prevents disease by serogroups A/C//Y/W-135.

Serogroup B meningococcal vaccine also available.

Occurs in outbreaks particularly in crowded settings.

Colonizer and cause invasive disease:

  • Meningitis
  • Meningococcemia


  • Pneumonia
  • Septic arthritis
  • Pericarditis
  • Conjunctivitis
  • Contact and droplet precautions until 24hrs of appropriate antimicrobial therapy.
  • Prophylaxis may be required for close contacts and healthcare workers. Contact Public Health