For instance, while N. meningitides groups B and C cause most disease episodes in Europe, group A is found in Asia and continues to predominate in Africa, where it causes most of the major epidemics in the meningitis belt, accounting for about 80% to 85% of documented meningococcal meningitis cases.
Primjerice, dok Neisseria meningitidis serogrupe B i C uzrokuje većinu bolesti u Europi, serogrupa A se nalazi u Aziji i trajno prevladava u Africi, gdje uzrokuje većinu velikih epidemija u meningitičnom pojasu i odgovorna je za oko 80 do 85 % dokazanih slučajeva meningokoknog meningitisa.