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:
Contact and droplet precautions until 24hrs of appropriate antimicrobial therapy.
Prophylaxis may be required for close contacts and healthcare workers. Contact Public Health