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. 2010 Jan 19;54(3):1016–1021. doi: 10.1128/AAC.01077-09

FIG. 1.

FIG. 1.

Proportions of N. meningitidis isolates by serogroup in Ontario from 2000 to 2006. Two isolates were nontypeable (NT). Serogroups B and C accounted 66.1% (36.5 and 29.6%, respectively) of the total laboratory-confirmed cases of N. meningitidis infection from 2000 to 2006. During the period from 2000 to 2006, there was a significant decrease in the proportion of cases due to serogroup C (from 37.5% in 2000 to 24.1% in 2006 [P = 0.01]). There was a relative increase in the proportion of cases due to serogroup B during the same time period.