Meningococcemia classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Classification

• The polysaccharide capsule is the basis of the serogroup typing system.
• 13 Serotypes are described based on capsular polysaccharide: A, B, C, D, X, Y, Z, E, W-135, H, I, K, and L.
• Serogroup A usually with epidemics in less developed nations and an attack rate of as high as 500 cases per 100,000 population.
• Serogroup B usually in developed nations with attack rate of 50-100 cases per 100,000 population.
• Serogroup C usually in both developed and less developed populations and an attack rate of up to 500 per 100,000 population.