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Phylogeny of paired meningococcal carriage isolates per sequence type. Splits tree based on single nucleotide polymorphism (SNP) in N. meningitidis core genome MLST genes (N. meningitidis cgMLST v1.0, available at pubMLST.org). Panel (a), (b), (c) and (d) show the most frequent sequence types (ST) ST-11, ST-53, ST-192 and ST-2880, respectively. Color codes show paired isolates from the same individual. A and B indicate time point, approximately two months apart
