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Linkage distance of 62 N. lactamica and 29 N. meningitidis sequence types (STs) identified among 1- to 29-year-old carriers from Burkina Faso in 2009, as determined by bootstrapped UPGMA analysis. For STs represented by more than one isolate, the number of isolates is given in parentheses. NmA, NmC, NmX, NmY, NmW135, and NmNG are abbreviations for serogroups A, C, X, Y, and W135 and nonserogroupable N. meningitidis, respectively. cc, clonal complex.
